Lab 5 Flashcards
what provides the energy necessary to rapidly form ATP by nonoxidative phosphorylation
intramuscular glycogen stores
those who MAINTAIN a high power output throughout the test
have a low fatigue index
energy stores exhausted formula
energy stores exhausted = maximal capacity/maximal power
supramaximal
power outputs above VO2max
fatigue index
the decline in power over the course of the test
what other factors may affect anaerobic performance
motivation and maximal strength
two approaches to assess anaerobic power
1) measure the substrates used (ATP or PCr) or metabolites produced (lactate)
2) measure the amount of external work performed during short duration, high intensity exercise
what does training do to the power equation
increases power and work and decreases time
if phosphates accumulate in muscle tissue without being utilized in ATP synthesis, what happens to force production
it is inhibited
how to calculate fatigue index
difference between the highest peak power and lowest peak power divided by the highest peak power
validity
ability of a test to measure what it claims to measure there is no gold standard to anaerobic performance test or measuring anaerobic energy release
how to set up the load on the wheel
7.5% of body weight (kg)
factors that explain differences among individuals anaerobic performance
capacity of immediate and glycolytic energy stores
what do both approaches that asses anaerobic power assume
that all the energy produced to perform high intensity activities comes from immediate and glycolytic sources **but this assumption is INVALID, as O2 consumption provides some energy even during short duration tasks
what is critical to initiate and sustain work output in all high intensity activities
nonoxidative ATP production
those who rapidly decline in power output during the test
have a high fatigue index
validity of Wingate test
there are positive correlations between Wingate peak power, type 2 fiber area, 50 m sprint time, and vertical jump height
-wingate test is not a valid test
how to set up the load on the wheel
7.5% of body weight (kg)
immediate energy sources chem equations and enzymes
ATP+H2O –> ADP +Pi via ATPase
CP+ADP –> ATP + C via creatine kinase
ADP + ADP —> ATP + AMP via adenylate kinase
rapid non-oxidative glycolysis chem equation
Glucose —> 2 ATP + 2 lactate
what are the most important factors in determining energy sources during exercise
intensity and duration
energy stores exhausted formula
energy stores exhausted = maximal capacity/maximal power
potential factors limiting anaerobic perfomance
energy depeletion (PCr) metabolite accumulation (H+ ions, inorganic phosphate)central and peripheral fatigue
what does training do to the power equation
increases power and work and decreases time
