EXSS1010 Lecture Notes - Lecture 7: Exercise Intensity, Vo2 Max, Glycolysis
30 May 2018
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EXSS1010 - CONSIDERATIONS FOR MEASUREMENT OF ENERGY CAPACITIES
THREE ENERGY SYSTEMS DURING ALL OUT EXERCISE
• Different energy systems resynthesise energy during different situations/times
• Influences tests used to estimate energy system capacity
o Sprinter vs endurance
o Anaerobic vs aerobic
• Measures physical performance or physiological markers
ANAEROBIC POWER TESTING - ATP PCr CAPACITY
• Power tests measure brief, maximal exercise capacity
o P = (FD) ÷ T
• P - Power
• F - Force
• D - Distance
• T - Time
• Types:
o Jumping - power tests
o Any all out exercise of 6-10 seconds
• Sprint
• Bike
• Assume:
o All ATP regenerates via ATP-PCr
o Adequate ATP and PCr to support maximal performance for about 6-10
seconds duration
PHYSIOOGICAL TESTS FOR ATP - PCr ENERGY SYSTEM
• Performance tests are usually task specific
• Can we measure physiology?
o Size of the intramuscular ATP-PCr pool
o Depletion rates of ATP and PCr in all-out, short-duration exercise
• Most direct estimate of ATP-PCr system capacity
• It is nearly impossible to readily obtain precise biochemical data during all-out
exercise of brief duration
ANAEROBIC POWER TESTING
• Perform maximal exercise for up to 3 minutes
o All-out runs, stationary cycling, shuttle runs, repetitive weight lifting of a
certain percentage of maximal capacity
• Wingate test: 30s supermaximal cycle
o Peak power reflects ATP-PCr
o Average power reflects glycolytic capacity
o Body mass determines resistance to pedalling
• Task specific
PHYSIOLOGICAL INDICATORS OF ANAEROBIC POWER
• Muscle glycogen depletion is invasive and difficult to collect
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Document Summary
Exss1010 - considerations for measurement of energy capacities. Three energy systems during all out exercise: different energy systems resynthesise energy during different situations/times. Influences tests used to estimate energy system capacity: sprinter vs endurance, anaerobic vs aerobic, measures physical performance or physiological markers. Anaerobic power testing - atp pcr capacity: power tests measure brief, maximal exercise capacity, p = (fd) t, p - power, f - force, d - distance, t - time, types: Jumping - power tests: any all out exercise of 6-10 seconds, sprint, bike, assume, all atp regenerates via atp-pcr, adequate atp and pcr to support maximal performance for about 6-10 seconds duration. It is nearly impossible to readily obtain precise biochemical data during all-out exercise of brief duration. Physiological indicators of anaerobic power: muscle glycogen depletion is invasive and difficult to collect, blood lactate level reflects glycolytic flux, may not reflect muscular levels. Increased demand for anaerobic energy leads to greater lactate production.
