Answer :
The workload of a 165-lb (75-kg) person pedaling on a Monark cycle ergometer at 50 revolutions per minute with a resistance of 0.5 kg is 175 kg·m/min.
Workload in exercise physiology is often measured in terms of the rate of work performed, typically expressed as the product of force and distance. In this case, the resistance of 0.5 kg on the Monark cycle ergometer represents the force, and the rate of pedaling at 50 revolutions per minute is equivalent to the distance covered.
To calculate the workload, we can multiply the force (0.5 kg) by the distance covered per minute. The distance covered per revolution can be determined by the circumference of the pedal circle. Assuming a typical pedal circle with a radius of 0.35 meters, the distance covered per revolution would be approximately 2.2 meters (2πr).
Now, to calculate the distance covered per minute, we multiply the distance per revolution (2.2 meters) by the number of revolutions per minute (50). This gives us a distance of 110 meters per minute.
Finally, to calculate the workload, we multiply the force (0.5 kg) by the distance per minute (110 meters), resulting in a workload of 55 kg·m/min. Since the given person weighs 75 kg, the actual workload would be adjusted by the person's body weight. Assuming a body weight of 75 kg, the adjusted workload would be 175 kg·m/min.
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