Three Main Energy Systems In An Athlete's Sport

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There are three main energy systems that take part in an athlete’s sport. For a 400m sprinter, the athlete uses a minimum of all three of these energy systems but predominately the Lactic Acid system.

A 400m metre runner uses the creatine phosphate system only once at the start of their race. This is to give them a spurt of energy built up in their body straight away when they hear the gun fire for their race to begin. The athlete then uses all the ATP built up in their body to push through their legs and give them power and strength to run.

After the athlete has used up their ATP energy system a molecule brakes off and eventually then taps into the lactic acid system. The 400m runner is predominately going to use the lactic acid system

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