Biology Lab Report Essay Example | Topics and Well Written Essays - 750 words - 1

Biology Lab Report - Essay Example There is necessity, especially in sports, where athletics are continuously striving to better themselves, to understand the relationships between cardiovascular fitness and exercise. Though the aforementioned cardiovascular responses to exercise and the factors that influence them are very complex this laboratory report contrives to seek relationship between one such response – heart rate – with exercise in a time-dependent manner. The Step Test will be applied to a total of ten subjects divided into two groups of five each. One group will be allowed to have more than six hours of sleep while the other will be allowed to have less than six. The hypothesis will be tested by counting the heart rates of the subjects at regular intervals during the test and compared to assess whether it holds true. Each subject steps up and down a low platform about 8 inches from the ground. He/she steps up and down for 3 minutes at the rate of 30 steps per minute. Each step is comprised of an up and down at a constant rate. A metronome is used to ensure that the stepping is constant for each subject. Each subject’s pulse rate will be measured using three fingers pressed over the radial artery in the wrist. The pulse rate will be tested for 30 seconds and multiplied by 2 to get the heart rate per second. There will be a count before the test (normal pulse rate) and another immediately after (pulse rate after stress). The subject should be made to sit quietly during the counting. The pulse rate for each subject should be counted at intervals of 30 seconds after the test till it returns to normal. There should be the first count immediately after the test and, thereafter, the next count should be made after 30 seconds rest. Thus, there should be alternate 30 seconds counts followed by 30 seconds rests till the rate returns to normal. The average heart rate