Energy systems Year 9 Active health

Energy Car Human Body Requires petrol Requires food Fuels engine for car to run Fuels vital organs such as the brain, heart, lungs, liver, kidney’s Stored in one central tank Stored around the body in muscles, fat deposit, blood No back up tank, need to refuel continually Different sources of fuels released depending on type of exercise

body get its energy from to function? Protein Fats Carbohydrates Where does your body get its energy from to function?

How does your body use these energy sources to produce movement? Answer:

Creatine Phosphate System (CP system) Uses carbohydrates for energy Does not require energy Dominant during short bursts of very high intensity exercises 0-15 sec RECOVERY: 2 Minutes to fully recover. After 30-50 secs 50% of the creatine will have been restored. This should now explain to you why high jumpers and long jumpers can continually back up their efforts. Examples???

Anaerobic system (Lactic Acid System) Uses carbohydrates for energy Does not require oxygen Dominant supply of energy during prolonged high intensity exercise 10-15 sec –1- 2min Produces a waste product known as: Lactic Acid RECOVERY: 15minutes = 50% 30 minutes = 100% Examples???

Lactic Acid Waste product that is built up in the muscle during high intensity exercise Prevents the muscles from producing movement Is removed by the blood during periods of rest

Aerobic system Uses carbohydrates and fats for energy If fat stores are low, the body will use protein as a source of energy Requires oxygen Much slower energy production than the anaerobic and creatine phosphate (CP) energy systems Supplies energy to long and prolonged physical activities 2 min + Recovery: 2 hours+ of continuous exercise: 24-48 hours Less than 1 hour: 6-25 hours Examples???

Interplay of energy systems

Heart rate + Energy systems Maximal heart rate: 220-age CP 90-100% Anaerobic 80-90% Aerobic 70-80%