A student designed an experiment to investigate a claim that athletes would have lower heart rates than nonathletes during exercise. After the students classified themselves as an athlete or a nonathlete, their resting pulses were determined. Then all the students performed the same exercise for four minutes and their heart rates were determined by recording the pulse rate in beats per minute. The students continued to measure their pulse rates for an additional four minutes. The average heart rate per minute for each group was determined. The data were recorded, as shown on the table below.

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06-12-2022
Biology

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A student designed an experiment to investigate a claim that athletes would have lower heart rates than nonathletes during exercise. After the students classified themselves as an athlete or a nonathlete, their resting pulses were determined. Then all the students performed the same exercise for four minutes and their heart rates were determined by recording the pulse rate in beats per minute. The students continued to measure their pulse rates for an additional four minutes. The average heart rate per minute for each group was determined. The data were recorded, as shown on the table below.

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Abhinavjh321idn Abhinavjh321idn · Answer 1 · 2022-12-08T22:43:28-05:00

After activity, the heart rates of the athletic students reverted to resting pulse in four minutes.

Physical activity is connected with haemodynamic alterations and modifies the loading circumstances of the heart. In dynamic exercise the emphasis is on movement with no or limited production of force. The key haemodynamic aspects are increases in heart rate and stroke volume, the two components of cardiac output. Although the overall effect is a mild to moderate increase in blood pressure, systemic vascular resistance declines. Volume exerts the heaviest burden on the heart. In static workout force is created with no or limited movement. The haemodynamic repercussions involve a small elevation of cardiac output, produced by the increase of heart rate, and a more dramatic rise of blood pressure, resulting in a pressure load on the heart.

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