The Body's Response to Acute Exercise Essay

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Unit 2: The Psychology of Fitness
Assignment 1: The Body’s Response to Acute Exercise

As a health and fitness instructor I need to be able to apply my anatomical and physiological knowledge to practical activities and exercises. I have conducted practical assessments to explore how the body responds to physical activity and exercise. I have then written a report, including all the anatomical and physiological changes that occur within each of the bodily systems.
Acute exercises are a lower intensity for a shorter period of time. For example it could be twenty minutes on the treadmill. Acute responses are immediate responses to exercise such as an increase in body temperature and heart rate.
Components of Fitness Test
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In the first energy system, ATP is useful for a very short time. After this, another chemical called PC (phosphocreatine) starts creating ATP. PC is like ATP in the fact that it is made from foods you eat and stored in the cells. The body stores only small amounts of ATP and PC, and the energy from this source can only be used for short quick bursts, such as lifting weights or the start of a race when you need an explosive burst of energy. The second energy system that is used when system one is depleted is called anaerobic glycosis. Anaerobic means "without oxygen". And glycosis is the breaking down of glucose. Glucose is a form of carbohydrate that is stored in the blood. So, this second energy system produces ATP by the process of breaking down glucose. The glucose is only partially broken down and it leaves a by-product behind called lactic acid. Lactic acid forms in the muscle and gives the feeling of discomfort and muscle fatigue, it also hinders the production of ATP.
The third energy system is called aerobic metabolism. Aerobic means oxygen. The body uses oxygen in combination with glucose, proteins, and fats stored within itself to produce large amounts of ATP. This produces high-energy ATP that lasts for hours and doesn't leave behind any fatiguing by-products such as lactic acid. Sports that rely on this energy system are
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