This subject would lose 12 pounds in 17 weeks by riding a bike at 10 MPH for 40 minutes per day fi ve times per week. Your weight-loss goals can be determined in the same way. Part 2 Now apply your knowledge of energy expenditure through exercise by solving the following problem. Jim weighs 220 pounds and wishes to lose 25 pounds by running or jogging at 5 MPH for 30 minutes per exercise session fi ve days per week. Do the calculations to solve Jim’s problem by following these steps: 1. Multiply body weight by the appropriate calories burned per minute per lb. from Table 8-3for running or jogging 5 MPH. 220 lbs. __0.064 coeffi cient __14.08____ calories/min. ___422.4___ calories/min. 30 min. ______ calories 2. Multiply the number of calories expended per workout by the number of workouts per week: __422.4____ calories 5 workouts/week _2112_____ ______ calories/week 3,500 calories/lb. __2112____ lbs. lost/week 3. Divide the total pounds to be lost by the number of pounds lost per week. 25 lbs. __1.4____ lbs. lost/week _17_____ weeks 4. a. How many calories will Jim expend per exercise session? ______ b. How many pounds will he lose per week at this energy expenditure? ______ c. How many weeks will it take Jim to lose 25 pounds? ______
We do not do your homework for you. Although it might take more effort to do the work on your own, you will profit more from your effort. We will be happy to evaluate your work though.
To solve Jim's problem, follow these steps:
1. Multiply Jim's body weight (220 lbs) by the appropriate calories burned per minute per lb for running or jogging at 5 MPH. The coefficient for this activity from Table 8-3 is 0.064.
Calculation: 220 lbs * 0.064 coefficient = 14.08 calories/min.
2. Multiply the number of calories expended per workout by the number of workouts per week. Jim will be exercising for 30 minutes per session, five days per week.
Calculation: 14.08 calories/min * 30 min = 422.4 calories per workout.
Jim will have five workouts per week, so:
Calculation: 422.4 calories/workout * 5 workouts/week = 2112 calories/week.
3. Divide the total pounds to be lost (25 lbs) by the number of pounds lost per week, which is calculated from the calorie expenditure.
Calculation: 25 lbs / 1.4 lbs lost/week = 17 weeks.
4. Answering the specific questions:
a. How many calories will Jim expend per exercise session?
Jim will expend 422.4 calories per exercise session.
b. How many pounds will he lose per week at this energy expenditure?
Jim will lose 1.4 pounds per week at this energy expenditure.
c. How many weeks will it take Jim to lose 25 pounds?
It will take Jim 17 weeks to lose 25 pounds based on his energy expenditure.
By following these calculations and steps, you can determine Jim's progress and the answers to the specific questions asked.