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To find out if different body positions effect the heart rate.

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Introduction

ZOHRA HAFEEZ 10BP BODY POSITIONS ON THE HEART RATE AIM To find out if different body positions effect the heart rate. POSITIONS 1 2 3 4 5 6 1- Standing, with arms at the side and legs together 2- Star position 3- Press up position 4- Laying down with arms at the side and legs together 5- Sat down with legs and arms out 6- Sat down with arms and legs down PREDICTION I predict that the body position will affect the heart rate. I think the position where your muscles are working the hardest will increase your heart rate the most. So in this case it will be position 3 because your muscles are working very hard to keep you in that position, they are working against the force of gravity. I also predict that the position that will not affect the heart rate the least will be position number 4 because in this position no muscles are working hard, most of the muscles are relaxing. EXPLANATION OF PREDICTION The reason I predict this is because when muscles work they need energy. To produce this energy the circulatory system has to carry the oxygen from the lungs, and the glucose from the food to all parts of the body. This enables the working cells to have enough energy to do their work. As the glucose and oxygen combine to release energy carbon dioxide and water is produced as waste products, which are then transported out of the body also in the plasma. ...read more.

Middle

To make this experiment more accurate I will:- * Repeat the experiment twice and then work out the average in beats per minute. * Use a stopwatch. * Be accurate when taking the pulse. SAFETY To make sure this experiment is safe and no one gets hurt I will:- * Do the experiment where you can not hit anyone or be hit by anyone. RESULTS Position Subject Time in pos Before After Average difference 1 2 3 1 2 3 before after 1 Zohra 2 min 60 61 64 68 62 67 61 65 4 2 Zohra 2 min 62 66 62 71 68 66 63 68 5 3 Zohra 2 min 69 66 67 109 98 80 67 96 29 4 Zohra 2 min 68 64 65 54 66 65 66 62 4 5 Zohra 2 min 56 60 62 66 72 64 59 67 8 6 Zohra 2 min 64 62 66 66 61 68 64 65 1 The chart shows the results that I obtained and I have calculated the average for each position. But now, I'm going to do a graph. From my results and this graph we can see that each position has a different affect on the pulse. Position 1:- Position 1 didn't have a big affect on the pulse rate. I think this was because standing up doesn't require your muscles to work really hard. ...read more.

Conclusion

It can also be very difficult to measure your heart rate because of human error. Other trivial things could also have caused inaccurate results like you may have been more tired after you did a few body positions. I could have also started with the same resting pulse rate each time, but I think it would have been very difficult to get your pulse rate at a certain rate every time. But I still think that these results are accurate enough to come to the conclusion that different body positions do affect the heart rate, but different positions have a different affect. Different body positions make more muscles work than others, the greater the demand for energy, the more glucose and oxygen needed to produce the blood. These substances including waste products that are made like carbon dioxide and water are transported in the blood, which has to be pumped around the body by the heart. The heart has to keep up with the demands needed so it has to pump blood faster around the circulatory system to the cells of the muscles. But if there isn't much of a demand for these products than the heart does not need to be pumped around the body as fast. To improve this experiment next time I would wait longer for my pulse to return to normal. I would also investigate more positions to see if the same things happen and I would also extend it to find out if it differs for boys and girls. ...read more.

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