Preparatory Lecture
Vo2 max and LIP testing
Today
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General comments and instructions
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Information
Procedure
Results
Questions
Discussion
Group time to make decisions
General comments
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What are your impressions of the labs so far?
Aim of labs- apply theory to practice
Use of voice- how (projection, tone etc) and
what you say
Explanations- make clear
Instructions- Be direct
Participants- identify beforehand, ensure
ready
Rest of the class- must be actively involved
Report
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Needs to be submitted before you start
presenting
Should be more detailed than powerpoint
Needs in text referencing
Details in lab manual
Your lab
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2 participants will complete LIP testing
May be male/female; elite/non-elite
Increased intensity every 5 minutes
Record Speed (intensity), HR, PRE, Lactate
every 5 minutes
Then increase intensity by 0.5 km/hr
(Incremental exercise)
Decisions in blue
Information
Explain things differently!!!
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Lactate Inflexion point
Determinants of LIP
Relationship between LIP/Vo2 max
Gender differences in LIP
Gender differences Vo2 max
Elite/ Non Elite differences – Chronic
adaptations
LIP
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Point where lactate accumulation increases
exponentially due to increased exercise intensity
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In early stages of incremental testing, when workload is
relatively easy, body is generating ATP aerobically
As gets harder- needs higher and higher contribution from
anaerobic glycolysis Lactate generated
If lactate production exceeds removal, it accumulates
Therefore indicates endurance capabilities as elite
athletes will be able to cater for ATP demands for a
longer period of time by aerobic means
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Because have increased Cardiac output, RBC capacity
to carry oxygen and extract it from the bloodstream. etc
Determinants of LIP
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All things affected by oxygen delivery, uptake;
lactate dissipation; and acid buffering
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HR, SV, Diffusion of oxygen, number RBC, bicarbonate
levels
Gender- more details later
Age- children can’t use glycolytic system as
efficiently (reduced phosphofructokinase) but
relative LIP is similar to equally trained adults
(Wilmore, Costill, & Kenney, 2008, p 392)
Training- trained athletes have higher LIP relative to
Vo2 max (LIP occurs at higher intensity of exercise
Relationship between LIP/Vo2 max
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Expressed in relative terms
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LIP is normally expressed as a percentage of an
individual’s Vo2 max
Lip reflects maximum capacity of aerobic
system
Gender differences in LIP
LIP similar in equally trained men and women
if expressed relative to Vo2 max
(Wilmore, Costill, & Kenney, 2008, p 430)
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Elite/ Non Elite differences
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Chronic adaptations
to training
Blood lactate
tolerance (LIP) adapts
faster than Vo2 max
(Denis et al., 1984
Cited by Bourdon,
2000)
By training at or just
above LIP, can
increase the intensity
at which it occurs.
Preparation
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Participants
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Clothing
Fluids
Food, alcohol, tobacco, caffeine
Avoid strenuous exercise immediately before
Sleep
Decide- gender/trained/same
Assistants
This is a strenuous test- consider participant interest and wellbeing
 Warm up- calculate 20% HR and warm up on treadmill
 Water boy/girl
 Someone to obtain step /beep test Vo2 max information
 Timer- stopwatch
 Speed Setter- calculate and increase during test
 Heart rate monitor monitor- fit and record
 Recorder- anecdotal comments
 Lactate measurement (2 people)
 Enter results into computer
 Cool down
Decide- How will you designate assistants?- make it direct and
interesting
Procedure
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Treadmill at 3% incline
5 min warm up on treadmill at a low speed (~6 km/hr)  HR @
20% Vo2 max HR
Subject straddles treadmill
 Take lactate, PRE, HR
Increase speed by 0.5km/hr
Continue for 5 minutes
Subject straddles treadmill
 Take lactate, PRE, HR
Etc until:
 30 minutes
 Subject wishes to stop
 Subject in danger of severe fatigue/fainting
 Lactate >
Equipment
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2 treadmills
Heart rate monitor
Stopwatches
calculators
Lactate- only one machine
DVD/TV/Music
Due to only one lactate measurement, will have to
either stagger the start of the participants, or do one
at a time
Results
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Results table
Will be available on my computer  WebCT
Discussion
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Overview- what
happened today???
What was found?
Questions
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1- Graph results- two x –axes
2- What did you notice? Observations
3- What is lactate inflexion point?
4- %vo2 max calculation and reasons for differences
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Non-athletes 50-60% Vo2 max, trained athletes 70-80% max
Gender- genetic
Trained- chronic adaptations
5- as coach- use to inform training practice- HR at
which they are training aerobically/ anaerobically
Fox and Haskell