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cardiovascular system and physical fitness

cardiovascular system and physical fitness - Procedure...

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Josh Young 5/05/08 Endocrinology Lab Linda Malmgren Lab Report: Cardiovascular System and Physical fitness Introduction: While the maximum cardiac rate (beats per minute) is the same in people of the same age group, those who are physically fit have a higher stroke volume (milliliters per beat) than more sedentary individuals. A person who is in poor physical condition, therefore, reaches his or her maximum cardiac rate at a lower work level than a person of comparable age who is in better shape. Persons who are in good physical condition can deliver more oxygen to their muscles (have higher aerobic capacity) before reaching maximum cardiac rate than can those in poorer condition. The physically fit thus have a slower rate of increase of the cardiac rate with exercise and a faster return to the resting cardiac rate after exercise. Physical fitness, therefore, involves not only muscular development but also the ability of the cardiovascular system to adapt to sudden changes in demand.
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Unformatted text preview: Procedure: Reclining pulse was measured by placing your fingertips on the radial artery in the ventrolateral region of the wrist. The number of pulses were counted in 30 seconds then multiplied by 2 to get the number of beats per minute. Then pulse rate was measured immediately upon standing. After this was the exercise portion. To do this, you placed your right foot on a chair or stair 18 inches high, and then raised your body so that your left foot comes to rest by your right foot, essentially “stepping up.” Then the left foot is returned to its original position. This exercise was repeated five times, with 3 seconds allowed for each step up. Immediately after this exercise pulse rate was measured for 15 seconds, and then multiplied by 4 to get the pulse rate. This pulse rate was then measured as described for 30, 60, 90, and 120 seconds after completion of the exercise. Then the amount of time it took for the pulse to return to normal standing level was recorded....
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