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