Question

***In order to receive credit for questions 1-2, round to the nearest tenth 1. Joe weighs 230 pounds and would like to lose 30 pounds. He eliminates 1500 calories/week from his diet and his exercise routine is as follows: Mondays: walks on level treadmill at 3.0 mph for 75 minutes (8.3 cals/min) Wednesdays: plays recreational tennis for 45 minutes (12.1 cals/min) Fridays: cycles leisurely at 5.5 mph for 30 minutes (7.8 çals/min) What is Joe's total energy expenditure/week based on his exercise routine? (3 pts.) How many calories is equivalent to 30 pounds? (1 pt.) Based on Joe's diet and exercise routine, how many weeks will it take him to lose 30 pounds? (1 pt.) 2. Andy weighs 185 pounds and would like to lose 15 pounds. He eliminates 900 calories/week from his diet and his exercise routine is as follows: Mondays: karate for 60 minutes (9.4 çals/min) & recreational volleyball for 30 minutes (13.7 çals/min) Tuesdays: swimming for 30 minutes (17.1 çals/min) Thursdays: leisure roller skating for 45 minutes (10.6 çals/min) Fridays: tournament badminton for 45 minutes (11.9 cals/min) What is Andy's total energy expenditure/week based on his exercise routine? (3 pts.) How many calories is equivalent to 15 pounds? (1 pt.) Based on Andy's diet and exercise routine, how many weeks will it take him to lose 15 pounds? (1 pt.)

Answer 1

1.

Total energy spent by walking on thread mill = time * calories burnt per minute

which is 75 * 8.3  = 622.5 cals

Total energy spent by playing recreational tennis = time * calories burnt per minute

which is 45 * 12.1 = 544.5 cals

Total energy spend by cycling = time * calories burnt per minute

which is 30 * 7.8 = 234 cals

Total energy expenditure per week on his exercise = energy spent by all the forms of exercise

which is 622.5 + 554.5 + 234 = 1401 calories

The total energy expenditure per week on his exercise is 1401 calories.

One pounds equals 3500 calories approximately.

30 pounds equals 30 * 3500 = 105,000 calories.

30 pounds is equivalent to 105,000 calories.

Energy deficit per week = energy expenditure on exercise + dietary calorie deficit

which is 1500 + 1401 = 2901 calories.

Time taken to loose 30 pounds = time taken to spend 105000 calories.

which is (energy equivalent of 30 pounds )/( energy deficit per week ) = 105000/2901

which is 36.2 weeks

It takes 36.2 weeks for joe to loose 30 pounds.

2.

Energy spent during activity = time * calories burnt per time

Total energy spent doing various physical activities is as follows

karate = 60 * 9.4 which is 564 cals

volleyball = 30 * 9.7 which is 291cals

swimming = 30 * 17.1 which is 513 cals

skating = 45 * 10.6 which is 477 cals

badminton = 45 * 11.9 which is 535.5 cals

total energy spent in all these activities combined = 564 + 291+513+477+535.5 which is 2380.5 cals

Andy’s total energy expenditure based on his exercise is 2380.5 cals

15 pounds is equivalent to 15*(energy equivalent to one pound) = 15*3500 which is 52,500

15 pounds is equivalent to 52,500 cals

Total energy deficit per week = energy spend on exercise + dietary calorie deficit

which is 2380.5 + 900 = 3280.5 calories

Time taken to loose 15 pounds = (energy equivalent of 15 pounds)/(energy spent or energy deficit per week)

which is 52,500 / 3280.5 = 16

It takes 16 weeks for Andy to loose 15 pounds.

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