1. Energy systems
Year 9 Active health

2. 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

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

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

5. 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 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???

6. 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???

7. 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

8. 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: hours
Less than 1 hour: hours
Examples???

9. Interplay of energy systems

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