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