YOUR GUIDE TO TREATING KNEE PAIN FUNCTIONAL KNEE RANGE OF MOTION Normal 0-135° Walking 0-65° Climbing up stairs 0-85° Going down stairs 0-90° Sitting down and standing up from sitting 0-90/95° more or less depending on the height of the chairs Riding a bike 0-115° Squatting 0-115° minimum Sitting cross legged 115° knee flexion Pressure on the knee and kneecap Walking 2-3x bodyweight (knee joint) 0.5x bodyweight (kneecap) Climbing up stairs 3-4x bodyweight (knee joint) 2.5x bodyweight (kneecap) Going down stairs 3.5x bodyweight (knee joint) 4x bodyweight (kneecap) Squatting 2-3x bodyweight (knee joint) 7-8x bodyweight (kneecap) FRONT KNEE PAIN Front knee pain is very common. It could be dull or sharp. Here are the 5 most common causes of front knee pain that accounts for pretty much 80% of knee pain that you will see in the clinic. 1. Patellofemoral pain syndrome (runners knee) This is the most common cause of front knee pain which is a problem with the patella not gliding properly in the patella groove. Although it is called runners knee it can happen to non-runners commonly as well. You may commonly see with this condition: general ache around the front of the knee and kneecap accounts for around 25% of all knee problems Pain in and around the kneecap that happens when you are active (running, skiing, sports). Or pain after sitting for a long time with the knees bent.(known as the cinema sign)e.g. sitting at a cinema, driving long distances, working at a desk) This sometimes causes weakness or feelings of instability. can be painful on stairs Rubbing, grinding, or clicking sound of the kneecap that you hear when you bend and straighten your knee usually little to no swelling can be caused by weak or tight muscles or both (muscle imbalances) pulling the kneecap to one side or too high comes on gradually Strengthening the VMO is essential as it controls the way the kneecap tracks avoid bent leg postures for long periods of time. PN FRONT KNEE PAIN 2. Patellar tendonitis (Jumpers knee) Jumper's knee, also known as patellar tendonitis, is a condition characterized by inflammation of your patellar tendon classically, hence the 'itis'. However, studies have shown that there is very little inflammation in many cases so it is more likely to be degeneration from wear and tear to the tendon. This is known as tendinosis. This is why ibuprofen and other anti-inflammatories may have no effect. You may commonly see with this condition: Pain and tenderness around your patellar tendon Pain with jumping, running, or walking Pain when bending or straightening your leg Tenderness behind the lower part of your kneecap usually develops gradually PN FRONT KNEE PAIN 3. Chondromalacia patella This is a common knee problem caused by a softening and damage to the cartilage on the back of the patella. The kneecap rubs against the edge of the patella groove. Abnormal knee cap positioning, tightness or weakness of the muscles associated with the knee, too much activity involving the knee, and flat feet may increase the likelihood of chondromalacia patella. Often affects young healthy people. You may commonly see with this condition: dull aching pain at the front of the knee A feeling of grinding when the knee is flexed and extended. pain worse doing knee bends , going down stairs, running down hill Standing up after sitting for awhile PN FRONT KNEE PAIN 4. Prepatellar bursitis (housemaids knee) Caused by inflammation of the bursa generally from frequent or prolonged kneeling. Bursitis means inflammation within a bursa. A bursa is a small sac of fluid with a thin lining. There are a number of bursae in the body. Bursae are normally found around joints and in places where ligaments and tendons pass over bones. They can also be found in other places if there has been unusual pressure or friction placed on that area. Generally, the function of a bursa is to help reduce friction and allow maximal range of motion around joints. When there is inflammation within a bursa (bursitis), the bursa swells due to an increase in the amount of fluid within the bursa sac. You may commonly see with this condition: Swelling on the front of the knee like a sac Pain when you push with your fingers on the swollen area. Redness on the swollen area Increased warmth on the swollen area Stiffness in the knee joint. Difficulty bending or straightening the knee Increased pain with kneeling Causes Trauma-direct blow to the knee Prolonged pressure to the knee (for example kneeling). Common among carpet layers, tile layers, gardeners and wrestlers Infection or autoimmune conditions Repetitive movements of the knee PN FRONT KNEE PAIN 5. Osgood Schlatter Disease Osgood Schlatter disease is a common but temporary knee pain that can affect older children and teenagers who play sports. Particularly sports that include a lot of jumping and knee bending – hockey, basketball, volleyball, skating, soccer, ballet, and gymnastics are examples. This is especially true during growth spurts when the bones are growing rapidly, and the patellar tendon is relatively short. The growth spurts commonly occur in boys (ages 11-18) and girls (ages 1016). The problem is more common in boys. The pain occurs where the kneecap tendon attaches to the bony bump (tibial tuberosity) below the knee. You may commonly see with this condition: Pain Swelling Redness Tenderness of the tendon Tender bony bump at the top of the shin bone, just below the kneecap. These symptoms will generally worsen with activities that involve a lot of jumping and knee bending. PN PAIN BEHIND THE KNEE 1. Bakers Cyst (Popliteal bursitis) This is the most common pain behind the knee. A cyst behind the knee is usually the result of a problem inside your knee joint (arthritis or a cartilage tear). Both conditions can cause increased inflammation and increased synovial fluid which seeps into the bursa behind the knee. Unfortunately, it seeps through a one-wayvalve phenomena and cannot seep back. Baker’s Cyst can be asymptomatic or present with mild discomfort. You may commonly see with this condition: Swelling behind your knee, and sometimes in your leg Knee pain Stiffness and inability to fully flex the knee PN PAIN BEHIND THE KNEE Arthritis: Arthritis can be the result of natural wear and tear of the knee joint (osteoarthritis), or it can be a more systemic inflammation problem caused by rheumatoid arthritis. Arthritis is generally worse with weight bearing, and stiffer in the mornings or after rest. Muscle or tendon tear or strain: Hamstring or calf sprain or tear. Indicated by sudden pain in your calf or hamstring muscles. Followed by swelling and inflammation. You may be able to feel point tenderness at the spot the tear occurred. Use of the calf or hamstring muscle generally increases your pain. PN PAIN BEHIND THE KNEE Deep Vein Thrombosis (DVT): A DVT is the occurrence of a blood clot in one or more of the deep veins of your leg. It can occur if you are on a medication affecting how your blood clots. It can also occur if you are immobile a long time due to surgery, long distant traveling (plane or car), or being on bedrest. DVTs can be serious because the clots in your veins can break loose and travel up and block blood flow in your lungs, heart or brain. Common DVT symptoms include: swelling in your foot, ankle, or leg, usually on one side cramping pain in your affected leg that usually begins in your calf severe, unexplained pain in your foot and ankle an area of skin that feels warmer, swollen and more painful than the skin on the surrounding areas skin over the affected area turning pale or a reddish or bluish color, depending on skin tone This condition MUST be referred to a Doctor PN INSIDE KNEE PAIN MCL (medial collateral ligament) tear The most common cause of medial knee pain in people under 50. MCL tears are the most common knee ligament injury, and approximately 40% of all knee injuries involve the MCL. An MCL tear is damage to the medial collateral ligament, which is a major ligament that’s located on the inner side of your knee. The tear can be partial (some fibers in the ligament are torn) or complete (the ligament is torn into two pieces). Can you still walk with a torn MCL? If you have a grade 1 (minor) MCL tear, you'll likely still be able to walk at the time of the injury, though it might be painful. A grade 2 (moderate) MCL tear could make it difficult to walk at the time of the injury since your knee won’t be as stable as it normally is. If you have a grade 3 (severe) MCL tear, it’ll be difficult to walk since your knee will be unstable, and you probably won’t want to walk since it’ll be very painful. In most cases, treatment for MCL tears involves using crutches to limit the amount of weight you put on your affected knee. If you injure your knee, it’s important to contact your healthcare provider immediately or go to the nearest hospital, even if you can still walk on it. PN INSIDE KNEE PAIN MCL (medial collateral ligament) tear Continued What causes an MCL tear? Sudden and forceful turning, twisting and “cutting” can cause MCL tears. A direct blow to the outer side of your knee can also cause an MCL tear. MCL tears are most common in people who play certain sports like skiing, football, basketball and volleyball. The following situations can cause an MCL tear: Planting one foot into the ground and forcefully shifting direction (this is known as “cutting” in sports). When something or someone hits your knee on its outer side, such as from a football tackle. Squatting or lifting heavy objects. Landing awkwardly on your knee after a jump. Hyperextending (overstretching) your knee. This is common in skiing. Repeated pressure and stress to your knee, which causes your MCL to lose its elasticity (like a worn-out rubber band). The symptoms of an MCL tear can vary based on how severe your tear is. If your MCL is torn, you may experience the following signs and symptoms: Hearing a popping sound at the time of the injury. Experiencing pain in your knee. Having tenderness along the inner side of your knee. Having stiffness and swelling in your knee. Feeling like your knee is going to “give out” if you put weight on it. Feeling your knee joint lock or catch when you use it. PN INSIDE KNEE PAIN Medial Meniscus Tear The medial meniscus is an important shock absorber on the inside (medial) aspect of the knee joint. It absorbs about 50% of the shock of the medial compartment. A meniscus tear can occur when the knee is suddenly twisted while the foot is planted on the ground. A tear can also develop slowly as the meniscus loses resiliency f you've torn your meniscus, it might take 24 hours or more for pain and swelling to begin, especially if the tear is small. You might develop the following signs and symptoms in your knee: A popping sensation Swelling or stiffness Pain, especially when twisting or rotating your knee Difficulty straightening your knee fully Feeling as though your knee is locked in place when you try to move it Feeling of your knee giving way PN INSIDE KNEE PAIN Pes Anserine Bursitis Pes anserine bursitis is an inflammation of the bursa located between the shinbone (tibia) and three tendons of the hamstring muscle at the inside of the knee. It occurs when the bursa becomes irritated and produces too much fluid, which causes it to swell and put pressure on the adjacent parts of the knee. Pain and tenderness on the inside of your knee, approximately 2 to 3 inches below the joint, are common symptoms of pes anserine bursitis of the knee. Bursitis usually develops as the result of overuse or constant friction and stress on the bursa. Pes anserine bursitis is common in athletes, particularly runners and swimmers (in particular breaststroke). People with osteoarthritis of the knee are also susceptible. The symptoms of pes anserine bursitis include: Pain slowly developing on the inside of your knee and/or in the center of the shinbone, approximately 2 to 3 inches below the knee joint. Pain increasing with exercise or climbing stairs Puffiness or tenderness to the touch in this area PN OUTSIDE KNEE PAIN Iliotibial Band Syndrome Pain on the outside of your knee is often Iliotibial band syndrome. Iliotibial band syndrome (ITBS) is one of the most common knee injuries. It is caused by friction between the iliotibial band (band on side of hip) and the lateral epicondyle of the femur (bony bump on the outside of the knee). The syndrome often appears with endurance sports such as cycling and long distant running. Weight training with heavy weights may also bring on the pain. Signs and Symptoms: Pain or a stinging sensation may be felt over the bump on the outside of the knee. This where the IT band slides over the bone. The pain may also travel up the side of the knee and slightly below. You may also feel swelling or a thickening of the tissue over the bone. The pain is most intense when the knee is bent to 30 degrees. The pain may not be felt immediately with the activity but may intensify with time such as running There may be a snapping when the knee is bent Causes: Your hip abductor muscles may be weak. You also may be internally rotating the hip (weak hip external rotators) which is causing your knee to bend in. Flat feet (pronating) would do the same. Training Habits that can contribute to ITBS include: Sitting in the lotus position for prolonged periods.(Lotus Position) Running on a surface which is banked or has a camber or running uphill or downhill. Excessive heel strike force when running. Running up and down stairs Hiking long distances PN OUTSIDE KNEE PAIN Lateral Collateral Ligament (LCL) Injury An LCL injury is a sprain or tear to the lateral collateral ligament (LCL). The LCL is a band of tissue on the outside of your knee. It connects your thighbone to the bone of your lower leg and helps keep the knee from bending outward. You can hurt your LCL during activities that involve bending, twisting, or a quick change of direction. For example, the LCL can be injured in football or soccer when the inside of the knee is hit. This type of injury can also occur during skiing and in other sports with lots of stop-andgo movements, jumping, or weaving. An injury to your LCL may cause: Swelling, pain, and tenderness. Several hours after the injury, your pain may get worse. And it might be harder to move your knee. There may be swelling or bruising. An unstable feeling in your knee, like it may lock up, buckle, or give out. PN GENERAL KNEE PAIN Some knee problems cause more generalized pain all around the knee and sometimes it even moves around to different areas. Some knee problems present differently depending on which structures have been damaged e.g. meniscus tears can present differently depending on the tear and its location. Also, when there is swelling it can also cause more diffuse generalized pain. 1. Cartilage/meniscus tear Tears can often cause general pain and can occur from either a trauma (acute injury) or from gradual wear and tear. Classic symptoms of meniscus tears include: Knee locking : when you try to straighten it it locks general ache with sharp, catching pain pain is worse when weight bearing particularily running, squatting and stairs. 2. Arthritis Osteoarthritis of the knee is a degenerative condition where the cartilage is worn down and damaged. Arthritis is the most common cause of knee pain for people over 50. Classic symptoms may include: Knee stiffness which is worse after resting e.g. first thing in the morning or after sitting for a while and then gradually eases after moving the joint around. end range movements can be restricted (extension and flexion) may be worse in cold weather may be worse after being on it(i.e standing, walking) commonly grinding, clicking noises (crepitus) and feel Swelling that may come and go PN GENERAL KNEE PAIN 3. ACL injuries Injuries to the ACL can cause generalized pain in the knee also. The classic symptoms are: a loud 'pop' is heard/felt in about 50% of injuries immediate knee swelling from the injury immediate pain can be severe instability knee will often give way knee movements are often restricted especially knee extension 4. PCL injuries. These are much less common and are usually caused by a sudden force through the top of the shin bone from the front which hyperextends the knee joint. Sometimes it may be from a twisting injury. The classic symptoms are : mild to moderate knee pain when weight bearing on a bent knee mild to moderate knee swelling instability but not likely to give way difficult in certain movements such as the push off movement when walking, carrying heavy items and taking off shoes they often say that the knee just doesnt feel right PN KNEE SYMPTOMS So now that you have heard about possible causes based on location, not lets try to narrow it down even more by specific symptoms. Noises-popping, clicking, crunching, snapping, grinding Many people can hear noises when squatting or standing up from being on the floor. Some people may bend or straighten the leg to get a 'releasing pop' and then it feels better. Popping that causes no pain: Gas bubbles: These are common causes of knee noises. The formation of gas bubbles in the joint (CO2) can form when we are resting and then the person starts moving they pop similar to bubble wrap. This is the same as cracking your knuckles. It doesnt cause harm and does not lead to arthritis. These are not harmful Ligaments/tendons: Sometimes called a tendon snap where as you move the joint that ligamt or tendon flicks over a bony prominence. These are not harmful Popping with an injury ACL tears: This is a loud pop and happens with about 50% of ACL tears and is often said to sound like a gunshot. MCL tears: a popping or tearing sound at the time of injury and then pain normally on the inside of the knee with pain, swelling and instability. They will also often have trouble bending the knee. PN KNEE SYMPTOMS Chronic painful popping without an injury Knee cartilage tear: a tear of the meniscus can cause pain and cracking or popping when the flap gets caught in the joint. There may also be locking and often swelling. These symptoms come and go as the flap gets caught and releases. Arthritis: This can produce noises from the wear and tear of the articular surfaces and maybe formation of bone spurs (osteophytes). The person may have painful popping, grinding and clicking noises. These noises tend to be consistent unlike the meniscus tear because the condition is causing it as opossed to the torn meniscus getting caught sporadically depending on where it is. Chondromalacia patella: These can commonly cause a grinding sensation due to the inflammation and irritation to the back of the kneecap cartilage. The grinding can often be felt when you put your hand on their kneecap and have them bend and straingthen the knee joint. It is most common in healthy, young sporty teenagers. Runners knee: This is due to a tracking problem of the knee cap in the the patellafemoral groove and can often create a grinding sensation on movements of the knee. The grinding noise tends to come and go. PN KNEE SYMPTOMS Noise coming from doing certain movements Painless Knee popping on extension: Generally due to gas bubbles or runners knee Painful knee popping on extension and flexion: generally cartilage damage or arthritis. If its painless probably gas bubbles. Painful popping when bending or squatting: Often due to a cartilage tear or Chondromalacia patella: Painful popping with twisting: Sudden knee pain and popping in a twisting motion is usually due to a ligament injury. Its most likely to be the ACL or MCL tearing. If the knee swells up and feels unstable they should see a Doctor. Will the popping ever stop? The popping depends on what is causing but very often it will just settle down in time. For example, soft tissue injuries take about 8-12 weeks to heal and the popping sounds generally abate after 2-3 months by doing knee strengthening exercises. If it is due to gas bubbles they will probably continue because it is not a structural problem. This is not a problem for the joint itself. PN KNEE SYMPTOMS Why is it swollen? Swelling is very common with many knee problems that have pain. Acute injuries: when someone injures their knee there can be bleeding in the joint causing the swelling. It will generally happen quickly after the injury and depending on the severity, there may be associated bruising as well. The more severe the injury the more swelling there will be and the quicker it will accumulate. Common problems: ACL tears: This is commonly seen in ACL tears which will be painful, may have heard a large pop and may be instability. Meniscus tears: swelling and also may be locking and painful to go up and down stairs and squatting. Bone fractures: These will normally be quite obvious and could involve any of the associated bones including the kneecap. These conditions should be referred to a Doctor. PN KNEE SYMPTOMS Why is it swollen? Effusion: Excess synovial fluid in the joint due to it being irritated. Knee swelling that occurs later from an injury If the swelling wasnt immediate like in the previous examples and maybe swells after a few hours to a few days after the injury the most likely cause is from effusion. This is an increase of synovial fluid rather than from bleeding. The injury tends not severe enough to cause bleeding but the body produces more synovial fluid to protect itself. The knee will not feel as tight as from a trauma that causes bleeding in the joint. Generally, the more swelling the worse the injury. Most common are: Meniscus irritation: caused by a compressive injury or a small tear Sprain: where the knee joint gets overstretched and a few fibers are torn but the ligament is still intact. The swelling may be better some days and worse others depending on the activities. PN KNEE SYMPTOMS Why is it swollen? Swelling without an injury that develops slowly This is generally due to an underlying knee condition that is caused by constant irritation creating inflammation. Arthritis: This is the most common cause of knee pain and swelling that comes on gradually and there is no injury in people over 50. The person may also complain of stiffness, crepitus and maybe worse in cold weather. Bursitis: this normally produces a small area of swelling rather than the whole knee being swollen caused by excess friction and irritation to the bursa. e.g. housemaids knee(prepatellar bursitis), bakers cyst (popliteal bursitis) or swelling on the inside of the knee and 2 inches down from the joint line (pes anserine) Tendonitis: the most common tendonitis is patellar tendonitis producing pain on the patella tendon below the knee at the front. Rapid swelling without an injury Infection: These usually occur after surgery or a deep cut or maybe even from an infection from somewher else in the body that has spread to the knee. These should be referred to a Doctor as antibiotics will most likely be need to treat the infection. Gout: Intense pain, maybe red and hot to the touch with limited movements. Gout is the most painful form of arthritis and is caused by needle like crystals which are like shards of glass that are produced from excess uric acid in the bloodstream. These are most often caused by a diet that is too high in purine rich foods and excess alcohol. PN KNEE SYMPTOMS Why is it swollen? Others causes These are rarer but I will add them in. Dislocated kneecap: This is when the kneecap slides out of its groove to one side and will cause a large deformity produced by the kneecap to the side of the knee. This is obvious to see and it can produce lots of swelling. Tumor: there are several types of tumors that can afect the knee and cause swelling. The person may also complain of being fatigued, feeling unwell and may have also loss of weight. DVT: deep vein thrombosis is a blood clot in one of the deep veins most commonly in the calf and usually after prolonged rest such as a long plane flight. The area will be swollen and will be painful, red and hot. This is a medical emergency. Osgood Schlatter: most commonly seen in young teenagers particularly after a growth spurt which produces a hard lump on the shin from tension on the tendon. PN KNEE SYMPTOMS Why is it unstable? One of the first things you want to ask the client is if it is actually giving way or it just feels like it will. In other words, it feels unstable but does not actually give way. Knee giving way: this is when the knee actually buckles from underneath them causing them to stumble or fall. Ligament tears: The most common reason for this is ligament tears and the most common is an ACL tear. The ligaments are there to provide stability for the knee joint so damage to them can cause a lack of stability especially when challenged such as changing direction and the structures cannot cope with the stress. The giving way is not normally painful. Meniscus tears: when the cartilage gets jammed in the joint this can also happen. This will be generally a painful giving way from the sharp pain. This is something that the client should see the Doctor for. PN KNEE SYMPTOMS Why is it unstable? Knee instability: So now we are talking about the client saying the knee feels like it is unstable but actually doesnt collapse under them. They may even say that they don't trust the knee. Pain: This can be caused by pain coming from the knee and the body's response is to want it to move away from the painful position but it wont let it collapse completely. This is commonly seen after a knee injury especially if there is swelling. Muscular weakness: This, as the name suggests, is due to muscle weakness and may have originally been due to a knee problem. The knee will feel unsteady or wobbly and is helped greatly by simply strengthening exercises. In summary, there may be instability in the short term from a knee injury as the body tries to protect itself from further damage or more chronic instability most likely after a knee problem. PN KNEE SYMPTOMS Why is it locking? You may have clients that complain about their knee locking and that they cant move if from its position, it is literally locked in position if only for a few seconds. There are two types of knee locking that we most commonly see. True knee locking: this is where, as the name would suggest is true knee locking where it actually physically stuck for a period of time. This is pretty rare to see though and usually occurs when the client wants to extend the knee. They may need to move the leg about a bit to free it up. This locking may or may not be painful and generally is caused by: Meniscus tear: This is the most common by far that you will see as the torn cartilage moves around in the joint and sometimes gets jammed and locks the joint until it moves again. Loose fragment: This can be caused by bone that is floating within the knee joint. Pseudo knee locking: This is where it feels like its locking but there isnt a physical structure blocking the joint from moving such as a bony fragment or cartilage. The cause of this can be due to muscle spasm from pain as the body tries to protect the joint. It could also be from swelling or both. The client may also say that it feels more of a 'catching ' feeling . One difference is that true locking normally happens on knee extension whereas pseudo locking happens on both flexion or extension. PN KNEE SYMPTOMS Why are they having knee pain when they run? This is a very common problem that you may see and there are several potential reasons. The knees take such force from jogging or running-up to 500-600% of body weight! It could be due to an injury due to a fall, a twist etc which will be obvious as the client will tell you that they did something to it.i.e. injured it when running. However, most commonly these are chronic problems caused by the repetitive nature. The pain generally starts gradually and gets worse over time. The most common causes are doing too much too soon at the start, increasing too much, changing the running e.g. going from different surfaces, or doing new training drills and biomechanical problems such as poor foot position and muscular weaknesses and tightness. Where is the knee pain located? Outside knee pain: the most common cause is ITBS (iliotibilal band syndrome). Inside knee pain: This could be due to meniscus pain. Weak gluteal muscles cause the arch to drop in the feet and can put excesive load on the inside of the knee. It will generally sharp and may come and go as they run. Front knee pain: The most common cause is patellofemoral syndrome which is from excess friction on the back of the kneecap due to poor tracking of the kneecap in the patella groove. This will present as a general ache normally at the front of the knee and gets worse from activity and also inactivity such as sitting for extended periods of time. PN KNEE SYMPTOMS Why are they having knee pain when they run? Front knee pain: It can also come from the patellar tendon which is known as jumpers knee (patellar tendonitis). This will be below the kneecap and the tendon will generally be tender to touch. Pain behind the knee: This will most commonly be from the hamstring tendons often due to hamstring tightness. Why are they having knee pain on stairs? Many knee problems make going up and down stairs painful. For some clients it may be worse going up and others when they go down, for some it's bad I both directions. Going upstairs: This tends to be meniscus related most commonly Going downstairs: this is more commonly seen with kneecap problems such as runners knee or Chondromalacia patellar. Sharp pain on stairs: Most commonly meniscus tears, bursitis, arthritis Why are they having knee pain squatting? If you remember that squatting produces 7-8 times body weight through the kneecap its little wonder they can feel pain. Squatting by the way is not bad for the knees if done correctly. There are ,many reasons that it could be painful such as kneecap problems (runners knee, Chondromalacia Patella ), patella tendonitis (jumpers knee), meniscus tears, arthritis or even ITBS PN ACUTE INJURIES The R.I.C.E Protocol is a MYTH: A Review and Recommendations The RICE (Rest, Ice, Compression, Elevation) protocol has been the preferred method of treatment for acute musculoskeletal injuries since its origin in a 1978 publication entitled “Sports Medicine Book” by Dr. Gabe Mirkin. These guidelines have been used by coaches and healthcare providers for over four decades with the intent of expediting the recovery process and reducing inflammation. Although popular, the implementation of this protocol to attenuate the recovery process is unsubstantiated. There is, however, an abundance of research that collectively supports the notion that ice and rest does not enhance the recovery process, but instead delays recovery, and may result in further damage to the tissue. Research in regard to compression and elevation is inconclusive, diluted and largely anecdotal. Definitive guidelines for their application have yet to be purported. As a result of the subsequent research that examined the validity of the protocol, Dr. Mirkin recanted his original position on the protocol in 2015. The objective of this article is to analyze the available evidence within the research literature to elucidate why the RICE protocol is not a credible method for enhancing the recovery process of acute musculoskeletal injuries. In addition, evidence- based alternatives to the protocol will be examined. These findings are important to consider and should be utilized by any healthcare professional; specifically, those who specialize in the facilitation of optimal recovery, as well as those who teach in health-related disciplines in higher education. PN ACUTE INJURIES In 1978, Dr. Gabe Mirkin released “Sportsmedicine Book” and coined the acronym “RICE” (Rest, Ice, Compression, and Elevation) to represent the four activities for treating acute athletic injuries. The RICE protocol has been ingrained in academic curriculum as well as in public perception for over four decades. In 2013, however, RICE was challenged by Gary Reinl in his book “Iced! The Illusionary Treatment Option.” Reinl cited numerous studies and anatomical resources in support of the notion that resting an injury, while wrapping it tightly (compression) with ice, is ineffective in accelerating the recovery process and could also result in further damage to the affected tissues. Following the release of Reinl’s book, Mirkin publicly recanted his original position on the RICE protocol in a 2015 publication on his personal website (31). Mirkin even wrote the foreword to Reinl’s second edition of “Iced! The Illusionary Treatment Option”, and offered his revised opinion on the protocol he created; Subsequent research shows that rest and ice can actually delay recovery. Mild movement helps tissue to heal faster, and the application of cold suppresses the immune responses that start and hasten recovery. Icing does help suppress pain, but athletes are usually far more interested in returning as quickly as possible to the playing field. So, today, RICE is not the preferred treatment for an acute athletic injury (36). PN ACUTE INJURIES Inflammation is commonly misunderstood and generally believed to be synonymous with swelling. However, the two are entirely different. Inflammation is the first phase of a three-phase sequence of tissue repair, while swelling is “the accumulation of waste at the end of the inflammatory process that is not yet evacuated” (36). Inflammation is not an undesired outcome that needs to be reduced or delayed, but rather an instantaneous defense mechanism with the primary objective of controlling the extent of cell injury and preparing the tissue for the process of repair (24). As noted by Leadbetter (23), “inflammation can occur without healing, but healing cannot occur without inflammation.” As the waste products produced by macrophages and neutrophils begin to accumulate around the damaged site in the form of fluid, the body relies on the lymphatic system to drain the area (36). The lymphatic system is a passive, one-way mode of transportation for excess fluid that relies on the voluntary contraction of the body’s tissues as a method of propulsion. “When fluid enters the terminal lymphatic capillaries, any motion in the tissues that intermittently compresses the lymphatic capillaries propels the lymph forward through the lymphatic system” (12). Therefore, to ensure the lymphatic’s system functionality, the muscles must be actively contracted to facilitate the efficient flow of lymph throughout the body. The inadequate functioning of the lymphatic system is the primary contributor to the accumulation of waste products, excess swelling, and the inability to allow for the optimal recovery of damaged tissues (36). As noted by Reinl (37), “there’s not too much inflammation, there’s too little evacuation.” When the body is able to successfully clear the damaged site of excess fluid via the lymphatic system, the process of repair is enabled (phase two of the recovery process). PN ACUTE INJURIES A More Optimal Approach: Active Recovery There is an abundance of available information that suggests moving early in the recovery process is more beneficial than extended periods of stillness (5, 6, 36, 37, 38). Reinl (36) proposed his own acronym for recovery, ARITA, which stands for “active recovery is the answer.” Active recovery is a broad term that can include any activity that involves the contraction of skeletal muscle tissue that was previously subjected to trauma (30). Active recovery can include activation/mobility exercises or low intensity physical activity that utilizes pain free movements through a full range of motion. If an injury is minor, rehabilitation can begin as early as the next day, assuming there is no pain associated with the desired movements. However, if the injury is severe, it is best to follow a physician’s advice on rehabilitation (31). PN ACUTE INJURIES MEAT (movement, exercise, analgesia, treatment) has been proposed as a more optimal alternative and effectively addresses the discrepancies surrounding the RICE protocol. Instead of resting an injury, this acronym suggests moving the damaged area through a range of motion that is pain free in an effort to provide the propulsive force required to adequately move lymph throughout the body. Exercise with resistance should be the next step beyond simple movements. Campbell (6) suggests that eccentric loading should be prioritized when rehabilitating a tendon injury. Analgesia, the inability to feel pain, is the third aspect of the MEAT protocol. Pain limits one’s ability to efficiently move the injured area through a full range of motion. It is quite common for people to rely on the use of NSAIDs (nonsteroidal anti-inflammatory drugs) for pain management. Common brand names of NSAIDs include Ibuprofen, Motrin, Aleve, or Advil. However, it is important to note that the use of NSAIDs will not accelerate, and may actually delay, the recovery process (44). NSAIDs inhibit the synthesis of prostaglandins, which initiate inflammation (44). Campbell (6) suggests Tylenol as an alternative, as it is not an NSAID and will not disrupt the inflammatory process. However, Tylenol can damage the liver and recommendations on a proper dosage should be followed. The final aspect of the MEAT protocol is treatment. This is a broad category that consists of treating the individual injury using a variety of therapeutic approaches that are utilized on a patient to patient basis. Campbell (6) suggests the consumption of certain supplements/nutrients that reduce inflammation, as well as the application of rehabilitation modalities such as kinesiology taping or acupuncture. PN ACUTE INJURIES CONCLUSIONS The theory of resting an injury while wrapping it tightly with ice to accelerate the recovery of damaged tissues seems to be completely predicated upon unsubstantiated reports dating back over four decades. The original support for the argument to ice musculoskeletal injuries was recanted in 2015 by the founding father of the RICE protocol (31). In otherwise healthy individuals, the body is well equipped with the means to adequately remove any accumulation of fluid from the damaged site, as it contains the lymphatic system that primarily functions to perform such duties. However, it is important to note that the success of the lymphatic system depends on the body’s ability to provide a propulsive force that facilitates the movement of lymph through active skeletal muscle contraction. In other words, movement of the body’s voluntary tissues is vital to the adequate functioning of this system. Therefore, an extended period of rest following an injury to a tendon, ligament, or muscle is not the most optimal way to accelerate the process of tissue regeneration. The notion of moving as much as possible following an injury is supported by the literature (5, 6, 30, 35, 38). I PN ACUTE INJURIES CONCLUSIONS (continued) In addition, the application of ice, or cryotherapy, has been found to not only delay recovery, but to also damage tissue in the process (9, 20, 27, 49). The evidence suggests that the application of ice is only necessary if pain reduction is the desired outcome (3, 8, 16, 19, 26). Evidence in support of compression and elevation is lacking, as most studies are inconclusive (4, 35, 51) and fail to establish definitive application guidelines that are supported by research. These findings, along with the public recant from Dr. Gabe Mirkin in 2015 (31), support the premise that the RICE protocol, which is a generally preferred method of immediate treatment for acute musculoskeletal injuries, is a myth. Based on the available literature, a rehabilitation protocol for an acute athletic injury should prioritize pain free movement through a full range of motion as early as possible and gradually progress to higher intensities and more complex movements. In addition, the healthcare professional should evaluate the individual injury and work with the patient or athlete to decide which therapeutic modalities are most appropriate. If a patient or athlete believes that compression or elevation is beneficial to their recovery process then the two modalities can be used, as it has been purported that there are no adverse side effects associated with their application. The method and duration of the compression should be at the discretion of the healthcare professional, as no definitive guidelines have been purported. However, there should be little to no utilization of ice or NSAIDs, unless the only desired outcome is pain reduction. I PN A MASSAGE THERAPIST'S GUIDE TO TREATING KNEE PAIN The End