UNIT 3 AOS 2 Flashcards
Adenosine Triphosphate (ATP)
- only source of energy for muscular contraction
- one adenosine molecule attached to three phosphate molecules
- when one P molecule breaks away, energy is produced
- phosphate that breaks off is inorganic phosphate
Phosphocreatine (CP)
chemical fuel used by the ATP-CP system
- when CP splits into phosphate and creatine, it produces energy that is used to rebuild ATP
- 10 seconds stored in muscles
carbohydrates
- moderate to high intensity
- preferred fuel source
- broken down and stored as glycogen or glucose then used for energy production
fats
- preferred fuel source at rest
- broken down and stored as triglycerides and broken down into free fatty acids
proteins
- only used for fuel when glycogen and triglycerides have been depleted
- broken down and stores as amino acids, provides energy required to rebuild ADP to ATP
ATP-CP energy system
- an anaerobic energy system that used PC as fuel
- produces energy by breaking down the chemical fuel creatine phosphate
- energy produced at an explosive rte
- 0-10 second duration
- fatigue is CP depletion
Anaerobic glycolysis
- 85-95% heart rate
- 10-75 second duration
- lactate and H+ irons are fatigue
- produces energy by partially breaking down glucose anaerobically
- system is limited by the accumulation of H+ ions (by products)
Aerobic glycolysis
- only system that requires oxygen
- produces energy by breaking down glycogen, free fatty acids or amino acids
- produced at slow rate due to complex chemical reactions
Aerobic lipolysis
- uses triglycerides as fuel
- used at rest or very low intensity
Muscle acidosis
the PH of the muscle decreases as a result of accumulation of metabolic by products. H+ ions (lactate)
- inhibits muscle from firing
- slower to replenish ATP at this point
Lactate inflection point (LIP)
- the point at which lactate production exceeds lactate removal
- when lactate reaches level 4mm/ol this is the point in which the concentration in the blood of the lactate will make a person reach LIP
Lactate shuffling
- shuttling the lactate from main muscle sights to other muscles
- if body can do this then the person has great aerobic system as they can flush out the by products consistently and replenish ATP stores
Passive recovery
- great for replenishing CP stores
- used between activities of very short duration and high intensity
active recovery
- best for the removal of metabolic by-products
- should be used when the anaerobic glycolysis system has been heavily used
oxygen uptake
Oxygen uptake, or VO2 represents the volume of oxygen able to be taken up by, transported to, and used by the body for energy production.
