Energy Production during Exercise Flashcards
Describe perceived exertion based on the Borg RPE Scale
what are the different energy production systems
- phosphocreatine system
- Glycolytic system
- Aerobic system
Describe the phosphocreatine system
- > used to provide a large amount of energy, very fast
- > doesn’t last long (around 10secs)
- > needed for activities such as sprinting
describe the glycolytic system
- > energy is produced from glucose/glycogen
- > can provide moderate levels of ATP
- > serves as the first step for the aerobic process
Pros and Cons of glycolytic system
Cons
- > low ATP produced
- > converts pyruvic acid into lactic acid
- > lactic acid impairs glycolysis, and muscle contractions
Pros
- > allows muscles to contract when O2 is limited in tissues with a low mitochondrial density
- > permits shorter-term, higher intensity exercies than oxidative metabolismcan sustain due to the rate of ATP production
why does lactate accumulate
Lactic acid buildup occurs when there’s not enough oxygen in the muscles to break down glucose and glycogen
describe the aerobic system
- > produces large amounts of ATP
- > lasts the longest but produces ATP the slowest of the three energy systems because numerous chemical reactions are required to produce ATP in this pathway
what is required for the aeroic system to function
- some sort of fuel sorce (carbs, fats, rarely proteins)
- O2
- mitochondria
the aerobic process
link how intensity influences an individuals VO2 levels
what is interval training
Interval training for the long term aerobic energy system would have a work-rest ratio of 1:1 or 1:2. The work periods would usually exceed several minutes and the rest periods would be active but at a lower intensity that could be sustained
continuous training
training that maintains a constant intensity and lasts for a prolonged period of time (usually longer than 15 minutes)
