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Biology Internal Assessment. How does exercise affect breathing rate?

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Introduction

BIOLOGY INTERNAL ASSESSMENT How does exercise effect breathing rate? ________________ Introduction Different activities have different effects on the breathing rate because of the difference in the amount of oxygen needed. This investigation will assess how breathing rate changes in three different state of humans? body: at rest, after light exercise and after heavy exercise. Base on the result we can find out the way in which our body adapts to particular activities that need different amount of oxygen or in another word, how exercises affect breathing rate. Research question What effect does exercises? intensity have on breathing rate? Hypothesis The increasing in the intensity of exercise results in the higher breathing rate. + At rest, breathing rate will maintain at normal speed to provide enough oxygen for cells to carry out aerobic respiration because at this state, body as well as muscle don?t need much energy. ...read more.

Middle

After chin up, use a stop watch to record the breathing rate in one minute (repeat step 1). Step 3: Take a rest in 5 minute. Step 4: Do chin up 8 times in order to measure breathing rate after heavy exercises. After chin up, use a stop watch to record the breathing rate in one minute (repeat step 1). Step 5: Take rest 10 minute. Then repeat the procedure for more 4 times. Result Table BREATHING RATE AT REST, AFTER LIGHT EXERCISE AND AFTER HEAVY EXERCISE Exercise Breathing Rate (bmp) Average (bmp) Trial 1 Trial 2 Trial 3 Trial 4 Trial 5 Rest 23 24 23 22 25 23 Light Exercise 40 38 41 40 40 40 Heavy Exercise 55 54 55 52 55 54 * Note: To calculate the average breathing rate we use the following formula: Graph shows the difference in breathing rate at rest, after light exercise and heavy exercise: Conclusion Base on intensity of exercise, breathing rate will change to adapt the need of oxygen: + At rest, breathing rate maintains as normal speed. ...read more.

Conclusion

This lactic acid can poison muscle and cause cramp, so that it must be removed from body as quick as possible. Therefore, we have to increase breathing rate in order to break down this amount lactic acid into energy. Evaluation There?s no anomaly during experiment carried out. However, there are still some limitations. + The rest period is quite short so that the person who does the exercise will not fully recover, which affects the following record of breathing rate. + Only one person does the exercise so that it?s difficult to assess how the result depends on physical condition of each individual. + The temperature at that time when we carried out the experiment is quite high, which might affect the result. Improvement + Increase the time for resting to 10 minutes. + Two people do the same exercise to compare the result. + Choose the best time of the day when body is in the best condition and is not affected by some factors such as: temperature, health? ...read more.

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