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In this assignment I am going to look at the types of energy the body uses and how it is produced in the body. I will look work done in comparison to a person's body mass. I will calculate my Basal Metabolic Rate.

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Introduction

Scientific Principles for Sport and Exercise Energy Systems Kelly Bush By Chloe Van Crugten Contents PAGE ONE: Title Page PAGE TWO: Contents PAGE THREE: introduction PAGE FOUR: Energy and Work PAGE FIVE: Basal Metabolic rate PAGE SIX - NINE: Role of ATP and Re-synthesising ATP. Introduction In this assignment I am going to look at the types of energy the body uses and how it is produced in the body. I will look work done in comparison to a person's body mass. I will calculate my Basal Metabolic Rate. The importance of the concept of energy becomes obvious with respect to how versatile the human body is in terms of movement and sporting activities. Even in the same activity the energy requirements can differ from one moment to the next. Energy cannot be created or destroyed; it can only be converted from one form to another. It is measured in joules or calories. The energy our body uses comes from food and is therefore known as chemical energy. Energy is produced by a series of complex chemical reactions and then converted into work by muscle contraction. If you don't use energy it is stored as fat. Fat is potential energy and when we use the energy for movement it is converted into kinetic energy. In sport it is important to be able to measure energy intake and expenditure. The internationally recognised unit for energy is 1joule. One joule is the energy required to move force of 1Newton over a distance of 1 meter. ...read more.

Middle

This also says he is not very strong. I produced the least power because my body mass is the lowest. Power is important particularly in athletic events such as throwing jumping and sprinting, because these events require explosive movement. From my results I am able to calculate the horsepower produced by myself and the other subjects. Calculating my Basal Metabolic Rate (BMR) This is the minimal calorific intake required to sustain life in a resting individual. This is the amount of energy our bodies would require if we slept all day. To work out my BMR I am going to use the following calculation: 65 + (9.6 x weight in Kg) + (1.8 x height in cm) - (4.7 x age in years)= My BMR is 701.5 calories This is just one method for calculating my BMR, I choose it because it takes into consideration height, weight and age but it doesn't consider the amount of physical activity. In a way this makes the calculation not as accurate as is could be. Although there are simpler methods of calculating BMR without using height weight and age which are even less accurate again. The Role of ATP When we exercise, where does all the energy that our body uses come from? All Energy comes from adenosine triphosphate ATP. ATP is a complex chemical compound which is formed with the chemical energy we get from food. It is stored in all cells but particularly muscle cells so that it is near by for muscle contraction. ...read more.

Conclusion

It process itself is again aerobic, under normal conditions proteins would only supply around 10% of the bodies energy. In cases of starvation this can increase dramatically having a bad effect on the body. Long duration activities rely on aerobic energy sources such as cycling, running, swimming and walking. So the body has three systems for producing energy (ATP) for exercise. ATP/PC system which is also called the phosphogen system. Anaerobic glycolysis also known as the lactic acid system, and also the aerobic energy systems. Although these are all constantly working once one is completed depleted another is called upon to be the main supplier. Some sports require a mixture of aerobic and anaerobic energy production, good examples of these are rugby and hockey games where the pace of a player in constantly changing. Anaerobic ATP production allows explosive actions, whilst the aerobic system provides the majority of ATP during phases of recovery and low intensity work. Training can be done that stresses the energy systems relevant the athletes sport, this makes physiological adaptations happen which improves performance. The table below shows amount of aerobic or anaerobic energy production in certain sports. Activity Aerobic % Anaerobic% 100m sprint 0 100 200m sprint 10 90 100m swim 20 80 Boxing 30 70 800m 40 60 1500m/hockey game 50 50 400m sprint 60 40 Rowing/2000m 70 30 3000m run 80 20 Cross country run 90 10 Marathon 100 0 Conclusion Humans need energy to live move and exercise, our body has its own stores of energy which don't last very long but then the body has its own way of re-making energy, either aerobically or anaerobically to allow exercise to continue. ...read more.

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