1. Unit 1 P7 Know the different types of energy systems

3. All movement requires energy. The methods by which your body generates energy is determined by the intensity and duration of the activity being undertaken. Activities that require short bursts effort like sprinting or jumping require the body to produce large amounts of energy over a short period of time. Marathon running or cycling require the body to provide continued energy production over a longer period and at a slower rate.

4. http://www.youtube.com/watch?v=5G 8cVpXpsL8

5. Phosphocreatine energy system ATP and Creatine phosphate make up the ATP-PC system. It is the immediate energy system. When exercise intensity is high, or energy needs are instantaneous, Creatine phosphate stored in the muscle is broken down to provide energy to make ATP. When the high energy bond in PC is broken, the energy it releases is used to resynthesise ATP. Explosive work can be achieved but only for up to 10 seconds at maximum intensity. For example 100metre runner.

6. Lactic acid energy system This is the short term energy system. To meet energy requirements of higher intensity over a longer period, such as during a 400 metre race, ATP can be made by the partial breakdown of glucose and glycogen. This is an aerobic process that does not require oxygen and is therefore not sustainable over a long duration.

7. Aerobic energy system This is the long term energy system. If plenty of oxygen is available, as it is during everyday movements and light exercise, glycogen and fatty acids break down to yield large amounts of ATP.

8. Phosphocreatine

9. 3 ENERGY SYSTEMS ATP/PC SYSTEM ANAEROBIC GLYCOLYSIS (Lactic acid system) AEROBIC ENERGY SYSTEM O2 RequiredNo Yes Speed of energy supply Very fastFastSlow Fuel SourceCreatine PhosphateCarbohydrates Carbohydrates &fats (protein in extremes) Amount of ATP Production Limited Unlimited By ProductsNoneLactic acidCO2,H2O & Heat Duration0-10secUp to 2minForever Cause of fatigue Limited supply ATP/PC Lactic acid productionUnlimited Activity Power based activities Sprint enduranceLong duration

10. ATP/PC SYSTEM Main source of energy in first 10 sec Peaks in output at approx 5sec Fatigues quickly due to depletion ATP/PC AEROBIC ENERGY SYSTEM Main source of energy from 30sec + (point when oxygen supply has increased sufficiently to contribute ATP) Unlimited capacity to work unless insufficient fuel supply (food) LACTIC ACID SYSTEM Main source of energy from 10- 30 sec Peaks in output at approx 20sec Fatigues due to build up of lactic acid Provides energy for up to 2min 10 s 20 s 30 s 60 s 2 min 4 min+ Energy contribution Time

11. ENERGY SYSTEM INTERPLAY