Essay on The Body's Response to Acute Exercise

2005 Words Feb 1st, 2014 9 Pages
Unit 2: The Psychology of Fitness
Assignment 1: The Body’s Response to Acute Exercise

Introduction:
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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Aerobic exercise (%) Anaerobic exercise (%)
100m sprint 0 100
200m sprint 10 90
100m swim 20 80
Boxing 30 70
800m 40 60
1500m/football game 50 50
400m 60 40
Rowing 2000m 70 30
3000m run 80 20
10,000m run 90 10
Marathon 0 100
Short bursts of high intensity exercise, like a 100m sprint, may rely almost entirely on anaerobic respiration. Energy for sustained periods of exercise, like a marathon, will be provided by aerobic respiration.
However, many forms of exercise will make use of more than one energy system. For example, in team sports like football or netball, there are periods of explosive activity and periods of less intense exercise. The proportion of aerobic and anaerobic respiration will vary according to the need.

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Cardiovascular Responses to Acute Exercise:
• Heart rate, stroke volume and cardiac output increase.
• Blood flow and blood pressure change.
This results in allowing the body to efficiently meet the demands that are placed on the body. More blood is forced out of the heart during exercise allowing more oxygen and nutrients to get to the muscles and fore waste to be removed more quickly. Blood flow distribution changes from rest to exercise as blood is redirected to the muscles and systems that need it.
Heart rate: The number of times the heart beats per minute increases.
Before: 70bpm
During: 90-110bpm
After: 80bpm
The amount of blood flowing around the body increases.
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