The effect of exercise on pulse rate The aim of this experiment is to investigate what effect the intensity of exercise has on your pulse rate. I will see what effect it has on my pulse, whether it increases, decreases or stays the same. Also I will investigate how quickly the pulse returns to its normal rate.
The heart is nearly all muscle. It has a big job to do. It is the pump that circulates blood around your body. The heart beats at about 70 beats per minute at rest, which increases during exercise.
The blood, pumped by the heart, travels all round the body in blood vessels. It leaves the heart in arteries and returns in veins. Most of the processes taking place in cells need energy to make them happen. All energy comes from food, which cells take in. The food mainly used for energy in cells is glucose.
The process by which energy is produced from food is called respiration.
During exercise the heartbeat may increase to 200 beats per minute. Using GCSE Biology by D.G Mackean I found that during exercise you can take around 25-30 breaths per minute, at rest this is around 16 breaths per minute. The increased rate of breathing during exercise allows more oxygen to dissolve in the blood and supply the active muscles.
The heartbeat is initiated by the pace maker, a small group of specialized muscle cells at the top of the right atrium. The pace maker receives two sets of nerves from the brain. One group of nerves speeds up the heart and the other group slows it down. This means the heart rate is adjusted to meet the needs of your body at times of rest, excitement or exertion.
I predict that my heart rate...