Week 10 Flashcards
What are the three major determinants of aerobic endurance performance?
- Muscular endurance (dynamic/static)
- Anaerobic endurance (ability to sustain or repeat intense, short-duration activities)
- Aerobic endurance (ability to perform prolonged dynamic exercise - whole body/large muscle groups - supported mainly by aerobic metabolism)
What do we really care about during a race?
The threshold - we don’t really care about the metabolic rate you can sustain during a race, we care more about how fast you can race at that metabolic rate
What is endurance performance determined by?
- VO2 max - max aerobic metabolic rate (your ceiling)
- threshold - max sustainable metabolic rate
- efficiency - how fast you can go at threshold
Describe maximal oxygen consumption (VO2 max)
- the max amount of O2 that can be consumed per unit time
- evaluated using a progressive test to exhaustion
- it is a rate
Describe max power of the cardiorespiratory system
- max rate at which O2 is taken in, transported, and used to supply energy (ATP) to support muscular and other work
- indication of the max amount of work that can be fueled aerobically (aka sustained)
What does VO2 max reflect
A persons functional capacity, health risk, and physiological function
What happen if O2 requirement is > than a persons VO2 max?
- the performance goal might be unrealistic
- the activity may not be possible nor safe
what is the fick equation
the fick equation explains the contributions of CV and resp systems to VO2 (and VO2 max)
VO2 = Q x [CaO2-CvO2]
what is VO2 max influenced by?
- training status
- sex
- age
- body mass/body comp
- genetics
- mode of exercise testing
why is VO2 max usually higher in males than females?
it is due to the physiological differences between the AVG male and female
- body mass - increased body size means you consume more O2
- body composition - increased lean mass means you consume more O2
- hemoglobin concentration - increased O2 carrying capacity means higher VO2 max
mostly due to the higher levels of testosterone
when does VO2 max decline
it declines throughout adulthood and changes with age
how does absolute VO2 max change with age?
- rapid increase throughout childhood
- peak at maturity (~20-25 years)
- decline throughout adulthood
how much can people improve VO2 max with endurance training?
most people can improve VO2 max 6-20% with endurance training (up to 50% reported)
how much do genetics account for the variation in VO2 max?
genetics accounts for 72%
- affects the baseline VO2 max as well as response to training
- affects body mass, body comp, function of the cardiorespiratory system, and pretty much everything else
copy down summary slides on page 11 of endurance performance I
