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In this report I will hopefully prove that my hypothesis, which is; 'the harder you exercise, the longer it takes for your heart to recover', is true.

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Introduction

Fitness Coursework Introduction In this report I will hopefully prove that my hypothesis, which is; 'the harder you exercise, the longer it takes for your heart to recover', is true. I believe this is true because the harder you exercise, the harder the heart has to pump more blood to supply oxygen to your muscles. When you exercise, your heart beats faster and contracts more forcefully, pushing out more blood and increasing its stroke volume. During exercise, the return of blood from your veins to your heart increases, causing the ventricles of your heart to fill more fully with blood, stretching them a bit. Like other muscles, the heart contracts more forcefully if it is stretched a little before contraction. So the increase in returning blood also adds to the stoke volume by increasing the volume of blood in each ventricle and by causing the heart to beat more forcefully. By training aerobically on a regular basis, you gradually increase the volume of blood that your heart can pump in a minute. This change results from an increase in your heart's stroke volume. To meet the needs of working muscle, the body has an orchestrated response involving the heart, blood vessels, nervous system, lungs, liver and skin. By two minutes of exercise, the body responds to supply working muscles with oxygen. When oxygen is present, glucose can be completely broken down into carbon dioxide and water in a process called aerobic respiration. We can show aerobic respiration as a word equation; OXYGEN + GLUCOSE = CARBON DIOXIDE + WATER + ENERGY The glucose can come from three different places: * Remaining glycogen supplies in the muscles. ...read more.

Middle

This can be attained by sitting down with their head and hands flat down on a table. * Step up on a 25cm bench every two seconds for five minutes. Have someone to help you keep the required pace. * Then record the pulse rate every 10 seconds for 300 seconds. * Use a formula and a calculator to determine the level of fitness. * The next day put the height of the bench up another 10cm and so on until the height of the bench reaches 45cm. Equipment To undertake this test I will require; * A bench or step at the heights of 25, 35 and 45 cm. * A stop watch. * A calculator. Risk assessment Before the test is carried out I need the athlete to complete a 'Health Questionnaire', as this will determine if it is safe for the person to take part in the fitness assessment. Also Before the test it is very important that the participant stretches, softens and relaxes their muscles, preparing them to handle the extra stress they will put on them during the test. Well-stretched joints are less likely to strain, sprain, or break and five minutes of stretching will prevent injury. It is however, just as important to cool down and that the participant does stop suddenly after they've finished the test. This is because the body isn't prepared to quit as quickly and a result of a sudden stop could cause cramps, dizziness, or even fainting. Slow to a stop by stepping at a slower pace. ...read more.

Conclusion

However, I've also learnt that even though the heart starts to recover quicker at the start, it doesn't recover straight away. This is because the muscles still need oxygen in order to recover, plus it is the time it takes for the muscles, heart and lungs to recover which determines how fit someone is. From my results I was also able to determine the level of fitness in which the athlete was at. The results were very good and showed that the first two test results were above average. I think my assessment was a fair test because I limited the factors which may influence the results, thus making it reliable. These factors were the following; * The ambient temperature, noise level and humidity. * The amount of sleep the athlete had prior to testing. * The athlete's emotional state. * Medication the athlete may be taking. * The time of day. * The athlete's caffeine intake. * The time since the athlete's last meal * The test environment - surface (track, grass, road, gym) * Accuracy of measurements (times etc.) * In appropriate warm up. * People present. * The knowledge and skill of the tester. If I was to make my assessment more reliable I would use a heart monitor to record the resting heart rates and a continuous, electronic, heart monitor (CEHM) to work out the recovery rate, I would use a CEHM as it would allow me to pinpoint the exact time it took the heart to recover and make my assessment more accurate. Also, if I had more time, I would do a comparison between the girl's recovery rate and boy's recovery rate, with the hypothesis, 'do boys heart rate recover quicker than girls?' Page 1 Fitness coursework ...read more.

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