Exercise Physiology System Flashcards
Basic overview of the cellular respiration process?
Respiration converts food energy into Adenosine Tri-Phosphate (ATP)
It does this using oxygen
What happens to respiration during exercise?
The supply and demand of oxygen available to muscle cells is effected by the duration and intensity of the individuals exercise as well as their level of fitness.
How many exercise energy systems are there?
3
What determines what exercise energy system is used?
Amount of oxygen available
What is the ATP-PCr System?
The most immediate energy source available.
Anaerobic in nature.
Uses Creatine Phosphate to produce ATP.
This immediate energy is only used for a brief, high intensity burst up to 10 seconds because muscles only store limited amounts of CP and ATP
What is the glycolytic system?
Anaerobic in nature
Along with ATP-PCr it dominates as a source of energy production in early stages of high intensity
ATP is produced through breakdown of glycogen/glucose (glygolysis)
This provides enough energy for high intensity (1-3 mins in duration)
Fatigue will occur due to accumulation of H+ ions. Without presence of O, H+ cannpt be removes = muscle cells become more acidic
What is the aerobic glycolysis system?
The oxidative system (aerobic)
The most complex of the systems. Relies on the breakdown of muscle glycogen, blood glucose, plasma free fatty acids and stored intramuscular fats to produce ATP.
High yield of energy
What is the aerobic energy system suited to?
Long-duration, sub maximal activity levels
Longer than 3 mins in duration
When will fatigue arise during the aerobic system?
When all available muscle glycogen and sugars have been used and transport of oxygen is insufficient.thus halting ATP production
What must be present for muscles to contract?
An action potential, calcium and ATP
