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Investigate the effect of exercise on our heart rate.

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Introduction

Introduction In this introduction you will find information on what happens when you do exercise and what happens to your heart as you grow up. You will know about aerobic and anaerobic respiration. We will also do an experiment to check how long it takes your heart rate to go back to your recovery rate. The Heart: The muscular walls of the ventricles contract and relax continually. Every time the muscle contract, blood is pushed out through the outlet valves and into the arteries. The surge of blood causes your heartbeat. You can feel this surge of blood as a pulse in the arteries, at your wrist. The ventricles have a very thick wall made of strong muscles fibres. They need to be strong because they pump about 70 times every minute up to about 37 000'000 Exercise can help you lose weight by burning calories and increasing metabolism. It also helps you handle stress by burning chemicals in your blood stream like adrenaline that are released when you're under stress. So where do you start: If you have a diagnosis of angina or are recovering from a heart attack, angioplasty or surgery to treat coronary artery disease, ask your doctor when it's safe to begin gradually increasing your physical activity. Talk with your doctor about attending a cardiac rehabilitation program in your community. Everyone over the age of 40 should talk with their doctor before beginning a program of vigorous exercise. Once you've got the go-ahead from your doctor, begin with activities you like. Running, although it's a superb conditioner, is not for everyone. ...read more.

Middle

Trainers to run in and to do exercise. Water to have a drink after you have done the exercise and checked your pulse. Diagram: Method: First of all we check our pulse three times before we start the experiment and record on a table. After we got our heart rate per minute we add them all together and divide by three to get a recovery rate per minute because to get an average pulse. Secondly we do our exercise in the playground for different time's altogether 5 minutes. First for one minute, we use a stop watch to time this and after our one minute of exercise we check our pulse for 30 seconds and x 2. We check our pulse by putting our hand near our heart or getting our two fingers and pressing down on our wrist. After you have checked your pulse for every minute you record on a table. You do exercise for 2 minutes and check your pulse and then 3 minutes and check your pulse, then 4 and finally 5 minutes. Fair Testing: - You can make this test fair by running the same speed for every minute. - You can also stop at the right time when the time of the exercise and check your pulse straight away. - Don't stop when you are exercising because it will make your heart rate go down. - Don't drink water while you are running because it will slow down your heart. Prediction What Happens to the Heart when we Exercise? This is my prediction where I talk about what might happen in the experiment. ...read more.

Conclusion

Plus we also found out how long it takes the pulse after exercising to go back to its rest rate. Evaluation: Yes our investigation went smoothly and very successfully, the thing that was really successful was that it was really easy; you only run around the playground for different times of minutes and then check your pulse and record on a table. It was really easy to record our results and make a line graph. My prediction was quite correct to the actual results that I found out. If I had to redo the exact investigation the things that I would change is the different lengths of running/ exercising around the play ground and check the pulse straight after the running time has finished to get closer results. Factor Which May Affected The Accuracy of My Results: - Another possible error in the investigation could or may have been is that the speed you run at for example, when you run for the fist minute you may be running much slower and the second time you may be running much quicker the second time. So next time I do this investigation I could try to run the same speed for every minute. Overall: In this investigation I have learnt a lot of new things that I didn't already now that I know now, those are - I have learnt that the more you exercise the higher your pulse rate goes. Yes I did enjoy this investigation very much because it was easy and practical and fun to do. I learnt some really cool things that I didn't know before and know I now because of this investigation. By Sultan Shafiq 9.T. Sultan Shafiq 9.T. - 1 - ...read more.

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