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Pulse Rate and Exercise Aim The aim of this investigation is to try and determine whether the amount of exercise we do has any effect on our pulse rate. Scientific Knowledge PULSE In order to complete this investigation successfully, we have to find out exactly what happens (scientifically), to our bodies when we exercise, and know exactly what our 'pulse rate' is. Pulse rate represents the beating of the heart, specifically the ejection of blood from the left ventricle to the general circulation of the body. Before the start of exercise, your pre-exercise rate usually rises above normal, and this is called an anticipatory response. During exercise, respiration increases based on the amount of work being done. When exercise is being completed, there is an increased demand for gas exchange, due to the circulatory system being under continuous stress. RESPIRATION All living things need energy to survive. Our energy comes from food. After we digest a meal, food substances...

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