Biomechanics Laboratory # 1--Task Analysis
Task 5: Standing in front of a light-weight door, open the door using a pushing motion,
and then close the door using a pulling motion. Use predominately an upper extremity
motion. Analyze the movement of your upper extremity.
Phase I: Pushing open the door (with the right arm)
Upper extremity:
Movement
Muscle(s) Used
Contraction Type
ROM
Scap. Protraction
Serratus Anterior
Concentric
2”
Shoulder Flexion
Anterior Deltoids
Concentric
0-75 degrees
Elbow Extension
Triceps
Concentric
45-0 degrees
Wrist Is fixed in extended position ( 90 degrees) against door
Fingers fixed in extended position (0 degrees) against door
Trunk:
Movement
Muscle(s Used
Contraction Type
ROM
Right External
Left Trunk
~ 0-15 degrees of
Obliques and Left
Concentric
Rotation
rotation
Internal Obliques
Stabilizers:
Erector Spinate--Isometric Contraction
Gluteus Maximus and Medius---Isometric Contraction
Gastroc and Soleus--Isometric Contraction
Phase II: Pulling Closed the door (with the right arm)
Grabbing the Door handle:
Movement
Muscle(s) Used
Contraction Type
ROM
90 degrees of
Forearm
Supinator, Biceps
Concentric
pronation to zero
Supination
degrees (netral)
IP Joints--0-90
degrees
Lumbricals, Flexor
Gripping Handle
PIP Joints--0-90
Digitorum, Flexor
Concentric
With Hand
degrees
Pollucis
DIP Joints--0-90
degrees
Pulling the door shut:
Upper extremity:
Movement
Muscle(s) Used
Contraction Type
ROM
Scap. Retraction
Rhomboids
Concentric
2” -0”
Shoulder Extension
Posterior Deltoids
Concentric
75-0 degrees
Elbow Flexion
Biceps
Concentric
0-45 degrees
IP, PIP and DIP
Lumbricals and
Grip handle-Isometric
Flexion
Flexor Digitorum
Wrist is in neutral position while hand grips door handle
no movement
Trunk:
Movement
Muscle(s) Used
Contraction Type
ROM
Concentric
15-0 degrees
Right Internal
Right trunk
Obliques & Left
Rotation
External Obliques
Stabalizers:
Erector Spinate--Isometric Contraction
Tibialis Anterior--Isometric Contraction
Quadriceps--Isometric Contraction
Psoas Major--Isometric Contraction
By:
William Keltz
Jaspreet Sawhney
Mary Stephen
Ashwini Valenkar