Download Energy Systems - PE

Energy Systems
• Muscles require energy to work
• The energy required by muscles comes from
a chemical compound called adenosine
triophosphate (ATP)
• ATP is stored in all muscle cells and is used
up in exercise
• ATP comes from the food we eat
• In the body there are 3 systems that break
down ATP to release energy
• The system used at any one time depends
on the activity being carried out
Energy Systems
Aerobic
Anaerobic
Creatine
Phosphate
ATP-CP
Lactic Acid
System
1. Aerobic System
• At rest and in everyday activities energy is
released aerobically, i.e. in the presence of
oxygen
• In the aerobic energy system oxygen is
present when ATP is made
• Large amounts of ATP are made without the
formation of any fatiguing by-products
• This type of energy is most suitable for
fuelling endurance activities (e.g. any event
lasting longer than 5 minutes)
1. Aerobic System
• Utilises proteins, fats and carbohydrate (
glycogen) for the resynthesis of ATP.
• The system can be developed by various
intensity runs:
• Run at 50-70% of MHR. This will place
demands on the muscle glycogen and liver
glycogen.
• Response= increase in liver glycogen and
muscle storage capacity.
1. Aerobic System
• The second run would be at 60-80% this
places demands on the system to cope with
lactate production.
• Response= increase tolerance of lactic acid
and quicker removal.
2. Anaerobic System
• There are 2 energy systems that provide
energy without the presence of oxygen
• The Lactic Acid system is used in activities
30 seconds to 2 minutes long
• Lactic Acid is a by-product of this energy
system and it accumulates in the muscles
and blood and causes fatigue
• In activities less than 10 seconds long a
system called the ATP-CP system is used
2. Lactic Acid System
• Once Creatine Phosphate is depleted the
body turns to stored glucose for ATP
production.
• The breakdown of glucose in anaerobic
conditions results in lactate and hydrogen
ions.
• The accumulation of hydrogen ions is the
limiting factor in 300m- 800m runs.
2. Lactic Acid System
• Training
5 x 300m 80% with 45 seconds recovery in
between. Pushes the lactic acid threshold.
8x 300m with 3 minutes recovery in betweenhelps aid lactate removal.
3. ATP- CP
ATP stores in the body last for approx 2
seconds and resynthesis of ATP from
Creatine Phosphate will continue until CP
stores in muscles are depleted approx 4-6
seconds.
Training.
4-8 seconds of high intensity work near peak
velocity.
10 x 30m sprints with 30seconds recovery in
between. Repeat 3 times with 3minutes in