Effects of Aerobic Exercise on Heart Rate

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The Effects of Aerobic Exercise on Heart Rate
Introduction: Our bodies need to be in balance in order to function properly, and there are many ways the body maintains balance, or homeostasis. Homeostasis is the maintenance of nearly constant conditions in the internal environment. Our normal heart rate is an example of our body in homeostasis and any sort of change, or stimulus, can alter it. Exercise, adrenaline in the blood, and a low blood pH are all stimuli that increase the heart rate. Exercise, for example, stimulates stretch receptors in the muscles. These receptors then send a signal to a part of the brain called the medulla oblongata that receives the sensory input. It then in turn sends nerve impulses to the sinoatrial node
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We could even hold a serious/heated discussion and see if heart rate is affected in an intense conversation. There are many different things you could do to test heart rate, as exercise is just one example.

Data: Each subject and their heart rate at certain time interval:
Subject Before exercise 0 minutes rest 1 min. rest 2 min. rest 3 min. rest 4 min. rest
1 100 BPM 120 BPM 104 BPM 104 BPM 104 BPM 104 BPM
2 120 160 156 156 152 148
3 72 100 76 80 76 72
4 72 120 80 72 72 72
5 96 136 124 120 100 100
6 68 120 72 72 76 80
7 60 116 64 64 64 64
8 68 160 84 88 80 84

Summary statement: Heart rate increases during and after exercise and begins to drop back down close to the basal rate after rest.

Citations
Heart Rate Regulation in Humans. (2010, January 23). The Student Room. Retrieved August 24, 2013, from
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