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Investigate the theory that when you exercise the more weight you carry the more your pulse rate will increase.
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David Bramall 11P Biology Investigation. Setting The Scene. Two people climbed a hill and when they got to the top one of them said he was out of breath, and his heart was beating really fast. The other one said it was because he was overweight. Investigate the theory that when you exercise the more weight you carry the more your pulse rate will increase. Prediction. I predict the harder someone exercises, the higher his or her heart/pulse rate would be. The blood has to be pumped round the body quicker by the heart. There are several reasons why this happens. Before and during the early stages of exercise the sympathetic nervous system is alerted and adrenaline is secreted in to the bloodstream. Triggered by impulses from the brain before exercise, the heart beats faster and general constriction of the arterioles except for those serving vital organs so that the blood under high pressure is...
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