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Experiment Plan. What effect does 2 minute of each leg muscle stretch (hamstring, calf stretch, thigh stretch) before exercise have on the rate of increase of heart rate during the exercise?

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Introduction

´╗┐Emirates International School: Biology Name: Ayush Tawakley Research Question: What effect does 2 minute of each leg muscle stretch (hamstring, calf stretch, thigh stretch) before exercise have on the rate of increase of heart rate during the exercise? Aim: Investing the effect of leg muscle stretching on the rate of increase in heart. Background Information: Heart rate is known as the number of heart beats for a specific amount of time usually per minute. The heart rate differs from person to person. The normal resting heart rate of an average adult is between 60 to 100 heartbeats per minute. Measuring the pulse is the most common method used for measuring heart rate. A point on the body where an artery?s pulsation is transmitted to the surface can be used to measure the heart rate. It is recommended that the thumb is not used to measure a person heart rate as it has a strong pulse by itself. Changes in heart rate occurs for a variety of reasons, some of them being stress, anxiety, an increase in physical activity, fatigue and illness. ...read more.

Middle

All these 4 factors affect the heart rate of a person. The exercises and stretch conducted by each participant needs to be the same and need to be done in the same environmental conditions (20 degrees Celsius, audio and visual interference, humidity and atmospheric pressure). A small demonstration of the 3 stretches (hamstring stretch; calf stretch and the thigh stretch) should be given before the experiment in order to make sure each participant does the same stretch. Doing the experiment in the same room for each participant can control the environmental conditions. The duration of the stretch (2 minute each) and exercise (5 minutes) needs to be controlled too. The resting time between the exercise before stretching and after stretching needs to be the same too (30 minutes). The speed of the treadmill should be constant at 8 kilometers per hour and there should be no incline. Materials: 1. A treadmill 2. A stop watch 3. Participants (ten 17 years old boys) 4. One wall (to lean against for stretching) 5. ...read more.

Conclusion

This should be done for two minutes too and the legs should be switched every 15 seconds. 11. After the calf stretch, the participant now needs to do a two minutes hamstring stretch. This is done by putting one foot in front of the other and then leaning on the front one as demonstrated on the picture below. Switch between each leg every 15 seconds. 12. The participant should have done 6 minutes of stretching in total. After this, repeat step 1 and 2 to determine and record heart rate. 13. Then repeat step 2-6. 14. Repeat step 1-13 for the next 9 participants and records each individual’s data. Data Collection: Table 1: Data without Stretching. Participant Number: Resting Heart Rate: (± 1 beat per minute) Final Heart Rate (± 1 beat per minute) Change in Heart Rate(± 1 beat per minute): 1 2 3 4 5 6 7 8 9 10 Table 2: Data with Stretching. Participant Number: Resting Heart Rate (± 1 beat per minute): Heart Rate after stretching(± 1 beat per minute): Final Heart Rate (± 1 beat per minute) : Change in Heart Rate(± 1 beat per minute): 1 2 3 4 5 6 7 8 9 10 ...read more.

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