How many calories will a 110-pound woman expend if she pedals on a Monark cycle ergometer at 50 rpm against a resistance of 2.5 kiloponds for 60 minutes?

Question

Quizplus · Accepted Answer

To calculate the calorie expenditure, we need to use the following formula:

Calories = [(Watts x 10) / body weight in kg] x 3.5 x duration in minutes

First, we need to convert the resistance from kiloponds to Newtons:

2.5 kiloponds = 2.5 x 1000 = 2500 Newtons

Next, we need to calculate the power output in watts:

Power output = force x distance / time
Distance per revolution = 6 meters (circumference of the Monark cycle ergometer flywheel)
Time per revolution = 60 sec / 50 rpm = 1.2 sec/rev
Force = 2500 N
Power output = 2500 N x 6 m / 1.2 sec = 12500 Watts

Now we can plug in the values in the formula:

Calories = [(12500 x 10) / 50.35] x 3.5 x 60
Calories = 209,049 / 50.35
Calories = 4,152.8
Calories ≈ 510

Therefore, the woman will expend approximately 510 calories by pedaling on a Monark cycle ergometer at 50 rpm against a resistance of 2.5 kiloponds for 60 minutes.

How Many Calories Will a 110-Pound Woman Expend If She