Advantages & Disadvantages Of Energy Systems

Revision notes on advantages and disadvantages of each energy system for A2 Physical Education, Exercise Physiology module.

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  • Created on: 10-01-08 12:59
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Advantages & Disadvantages of the Energy Systems
The Alactic Energy System
Very Fast reaction speed
Can create energy very very fast for quick burst of maximal effort
No BiProducts
O2 not required so no delay
Phospho Creatine resynthesisis quickly and recover time is very quick
Very few steps in reaction
High intensity energy for high intensity exercise
Only lasts for 10 seconds
Small amount of Phospho Creatine
One molecule of ATP resynthesised for one molecule of Phospho Creatine
The Lactic Acid System
Has a fast speed of reaction for fast work
Does not require O2
Few chemical reactions
Large amount provides more ATP than the Alactic Energy System
Lowers PH in muscle which prevents enzymes from working so glucose and
glycogen cannot be broken down, this results in fatigue and muscle spasms
Creates Pyruvic Acid which turns into Lactic Acid
Aerobic Energy System
Can work continually from 2 minutes onwards and can last for a very long
period of time.
Breaks down potential fat energy
BiProducts aren't harmful and can be breathed and perspired from the body
Large amounts of ATP 38 Molecules for 1 Glycogen
Can only work in submaximal work
Endurance work can cause dehydration and boredom
Cannot resynthesise ATP immediately
Short delay for O2 to transport from lungs to working muscles

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Cannot provide ATP while working at higher intensities because of the time
taken to get to the working muscles
Muscles have to be fully saturated with oxygen before the energy system can
take effect…read more


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