The Physiology of Fitness Essay

3134 Words May 18th, 2014 13 Pages
BTEC Level 3
Unit 2: The Physiology of Fitness

Describe the musculoskeletal and energy systems response to acute exercise.

What is an acute response?
An acute response is an immediate response to exercise.
Acute exercise will last throughout the full length of your training session. During the training session our bodies begin to respond to the exercises we are doing and begin to feel the changes within our bodies and mind due to physical strain and stress of the physical activity in lots of different ways.
Musculoskeletal response
Increased blood supply: the increased blood supply occurs in the body due to the increase in demand for more oxygen and this is due to the working muscles needing more oxygen and energy during
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To improve the force of contraction, an athlete should do plyometric training and Creatine loading, this will increase powerful movements.
There are some weaknesses of the Phosphocreatine system and there are: the amount of ATP that is produced is limited. It is limited due to the Creatine been stored in the muscles and liver. Although it gives a short burst of energy it only lasts around 8 seconds which is a weakness if it is used for endurance events because it wouldn’t be able to produce an explosive and powerful movement. A marathon runner wouldn’t be able to use this Phosphocreatine system because it only releases a short burst of energy of about 8 seconds whereas marathon runners need to use the aerobic energy system because the duration is unlimited and the oxygen will never run out.

Lactic acid: This energy system is used without using any oxygen. It is used for activities that use large amounts of energy over a short period of time. The glycogen stored in the muscles helps the breakdown of ATP to become ADP with no oxygen involved. Seen as though the glycogen is stored in the muscles and liver it is available quickly. This system provides ATP when ATP-PC runs out. ATP-PC lasts for

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