Stage 2 PE Studies
Stage 2 PE Studies
This section requires you to consider the physiological responses of the body to exercise and the utilisation of fuels and energy systems
1) Describe 5 immediate physiological responses of the body that would have occurred during the warm up. How would these immediate responses enhance performance in the 400m?
5 immediate physiological responses of the body that would have occurred during the warm- up are Increase heart rate, increase stroke volume and cardiac output, increase in respiratory rate and tidal volume, increase blood pressure and
Increase Heart Rate
Heart rate is the rate at which the heart beats. During exercise there is an increased demand for fuels and oxygen by the working muscles, there is also an increased need to remove waste products. The heart needs to pump faster or harder to complete this job. During a 400m race, this would enhance performance by removing unnecessary waste products from the muscles and supplying more oxygen to the muscles.
Increase Stroke Volume and Cardiac Output
Stroke volume is the amount of blood pumped out of one ventricle with each beat. Cardiac output is the amount of blood pumped out of the heart every minute. It is calculated by stroke volume x heart rate. Both the stroke volume and cardiac output will determine how much blood is pumped around the body therefore determining how much oxygen will reach the working muscles. The more blood pumped out of the heart the more work an individual can do. This will enhance performance in a 400m race because the individual’s heart will pump more blood around the body and deliver more oxygen to the working muscles allowing more work to be done.
Increase in Respiratory rate and Tidal volume
Tidal volume is the amount of air breathed in and out with each breath and respiratory rate is the rate at much a person inhales and exhales. When resting you take in around 15 breaths per minute but during exercise (warm-up)...