Lab Exam 1- Lab 5 Flashcards
(60 cards)
an athlete with greater stores of high energy phosphates and metabolic enzymes can use those stores at what intensity and duration before needing to depend on nonoxidative and oxidative energy from glycolysis
higher intensity and longer duration
energy stores exhausted formula
energy stores exhausted = maximal capacity/maximal power
examples of situations in which we would use non-oxidative ATP production
400 m run
200 m swim
sprint sports like soccer and basketball
factors that explain differences among individuals anaerobic performance
capacity of immediate and glycolytic energy stores
ability to manage metabolite accumulation, specifically H ions and phosphates
fatigue index
the decline in power over the course of the test
greater buffering of H ions from lactate can prevent
force reductions and loss of enzymatic function
how does the body’s energy systems interact to meet energy systems
dependent on power and capacity of the three energy systems
how does training improve anaerobic performance
increase in type 2 skeletal muscle fibers
improve ATP-PCr system
Improve glycolytic system
how to assess anaerobic power and capacity
measure changes in chemical substances used (ATP, PCr, glycogen) or produced (lactate) as a result of anaerobic metabolism
quantify work or power to indirectly measure anaerobic energy utilization
how to calculate fatigue index
difference between the highest peak power and lowest peak power divided by the highest peak power
how to set up the load on the wheel
7.5% of body weight (kg)
if phosphates accumulate in muscle tissue without being utilized in ATP synthesis, what happens to force production
its inhibited
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
is an energy system ever turned off?
no- none of the energy systems are ever completely turned off
longer term anaerobic performances are associated with
higher blood lactate levels, supporting the idea that all out exercise training enhances the capacity of the glycolytic system to produce energy
maximal efforts sustained for more than 10-15 seconds requires assistance from which systems
glycolytic and oxidative ATP pathways to sustain work output and “recharge” the pool of high energy phosphates
mean power
energy derived from glycolysis
used from wingate anaerobic test and is data from the total power generated over 30 seconds
aka supramaximal capacity
peak power
energy derived from ATP and CP
used in wingate anaerobic test from the five seconds with the highest power value
potential factors limiting anaerobic performance
energy depletion (PCr)
metabolite accumulation (H+ ions, inorganic phosphate)
central and peripheral fatigue
rapid non-oxidative glycolysis chem equation
Glucose —> 2 ATP + 2 lactate
stored phosphagens can provide enough energy for
a brisk one minute walk, a slow 20 second run, or an all out sprint for 10 seconds
supramaximal
power outputs above VO2 max
those who MAINTAIN a high power output throughout the test
have a low fatigue index
those who rapidly decline in power output during the test
have a high fatigue index
