Energy Systems
ATP-CP
Anaerobic Glycolosis
Aerobic
resynthesis
breakdown
third phosphate splits and releases energy
ATP Cycle
needs to be resynthesises
Explosive/maximum intensity
Anaerobic
Breaks down the Creatine Phosphate
Lasts up to 20 seconds
CP lasts 20 seconds
able to occur because of Chemical energy provided
Chemical Fuels
Food Fuels
Creatine Phosphate (CP)
Fats
Protein
Carbohydrates
Limited storage
Chemical fuel containing high energy phosphate
Sugars/starches - bread, pasta, fruit and veg
concentrated fuel source in oils, nuts, meats
Body's preferred source of fuel under exercise conditions
Preferred source of fuels at rest/submaximal exercise (2/3)
muscle growth and repair
minimal contribution during exercise
Found in meat, fish, eggs, legumes and grains
digested to glucose and stored in muscles in liver (glucogen)
digested to free fatty acids and stored in triglycerides
digested to amino acids and stored as fat
36 ATP per molecule
147 ATP per molecule - 441 for a triglyceride (3*147)
8 oxygen per mole of protein
5.5 oxygen per mole of fatty acids
3.5 oxygen per mole of carbs
Cycle of energy
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carbs are the main source of fuel for both aerobic and anaerobic exercise
Higher percentage of Aerobic energy for longer exercises
Higher percentage of anaerobic energy for shorter exercises
energy for muscle contractions
Energy from fuels
system limited by the amount of creatine phosphate stored in the muscles
phosphate splits from creatine and energy goes to resynthesise ATP
depletion of CP causes fatigue
no oxygen required
95%+ (MHR)
Anaerobic system
Breaks down glucose without oxygen
Energy breaks down at a faster rate than aerobic
Depends on the amount of Hydrogen atoms H+
pyruvic acid
lactic acid
fatigue
slower than ATP-PC but faster than Aerobic system
predominant system for high intensity exercise for roughly 60 seconds.
main fuel is glycogen
high intensity exercise (85-95% MHR)
can last for many hours
main fuel source is low GI carbohydrates and triglycerides
Energy is produced at a slow rate due to the
insufficieint oxygen
breaks down glucose
pyretic acid
sufficient energy
predominant system for long, low intensity exercise/rest
submaximan (70-85% MHR)
rest (70% MHR)
fatigue comes from the depletion of glycogen and thermoregulatory fatigue