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# The Effect Of Exercise On Heart rate

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Introduction

The Effect Of Exercise On Heart rate We know that when we exercise our heart rate changes. I am going to do an investigation to look at the effects of exercise on your heart rate. There are many different ways to exercise the heart. These include: > Step Ups > Running > Skipping > Walking > Star Jumps > Cycling > Swimming > Ball Games Most of these exercises are not suitable for my investigation because I am going to complete the investigation inside a classroom; this limits the amount of space available. The reasons that I cannot use most of these exercises are mainly because I would not be able to control the variables. Other reasons include the cost of some of the exercises or the skill factor. For swimming everyone would have to able to swim, and then they would have to keep at the same pace for the allotted time. Also there would be a cost to use a swimming pool, and if it were a busy day it would be difficult to swim at the same pace to keep it a fair test, and the fact that I have to complete my investigation in a classroom. Cycling would not be suitable because: a) You can't ride a bike in a classroom with limited space. b) If I used a treadmill these would be a cost. ...read more.

Middle

The gradient and the surface are going to be kept the same because the bench used will be at the same height at all times, and the floor will be the same because the bench will not be moved. Method Everyone completing the investigation will take and record their resting pulse twice for a minute each time before starting the exercise. They will then complete the step-ups to the beat for 1 minute, take their pulse for 30 seconds, times it by 2 and record it. I am going to do the exercise for 1 minute, 2 minutes, 3 minutes, 4 minutes and 5 minutes. After each of the exercises your pulse must be recorded, for 1 minute (30 Seconds x 2). Before moving on to the next time, your pulse must have returned back to nearly resting, or the test will not be fair. Prediction I am predicting that when I am resting my pulse will be at about 80bpm (Beats/Min), because an average fit person is 66bpm and I don't think that I am an average fit person. After 5 minutes my pulse will be well over 105bpm. This is because exercise starts in our muscles. Our muscles contract and relax for us to move our body. Our muscles can't just do this at any time they want. They need energy to do it. They burn energy in cells in the muscle fibres. It is the millions of muscle fibres that make up a muscle. ...read more.

Conclusion

Heart Rate (Pulse) (Bpm) Resting 72 Resting 76 1 80 2 88 3 92 4 102 5 114 I think that the anomalous result would be the 3rd minutes heart rate. It increases by 8bpm in the minute whereas the 2nd minutes result only increases by 4bpm. As I did longer exercises the difference between the heart rates increased. Time Exercised (Minutes) Difference In Heart Rate Resting 72 Resting +4 1 +4 2 +8 3 +4 4 +10 5 +12 From the 1st resting pulse I recorded, my heart rate increased by 4,4,8,4,10 and then 12. I think that this also shows that the anomalous result is the 3rd minutes heart rate. If the 2nd minutes heart rate had increased by 5 bpm, it would of kept the pattern. Because this would of made the 4th minutes heart rate increase by 7 bpm. This would have made the pattern as follows: +4, +5, +7, +10, +12. This would have made my results a lot better. Conclusion I think that if I carried out the investigation again I would probably of taken my pulse for 1 minute, instead of for 30 seconds and then x2. This is because different people have different recovery times. An extremely fit persons heart would recover from the exercise quickly. But because they took their pulse for only 30 seconds it would be inaccurate. They may recover faster in the second half of the minute and this would not be show in the results because their pulse was only recorded for 30 seconds. Sean Beggs Biology Coursework 2001 Mr. Bates ...read more.

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