Burning Calories Many people are interested in losing weight through exercise co
ID: 3195765 • Letter: B
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Burning Calories Many people are interested in losing weight through exercise consider is that a person needs to burn off 3,500 calories more than h to lose 1 lb, according to the American Dietetic Association . An important fact to e or she takes in The table shows the number of calories burned per h activities, where the figures are based on a 150-lb person. our (cal/hr) for a variety of Activity Bicycling 6 mi/h Bicycling 12 mi/hr Cross-country skiing Jogging 5 mi/hr Jogging 7 mi/hr Jumping rope Running in place Cal/hr 240 410 Activity Running 10 mi/hr Swimming 25 yd/min Swimming 50 yd/min Tennis (singles) Walking 2 mi/hr Walking 3 mi/hr Walking 4 mi/hr Cal/hr 1,280 275 tion 700 500 740 920 750 650 400 240 320 440 2 2 Work with your group members to solve each problem. You may find that setting up proportions is helpful. For problems 1 through 4, assume a 150-lb person 1. If a person jogs at a rate of, mi/hr for 3 hr in a week, how many calories will 2 the person burn? 2. If a person runs in place for 15 min, how many calories will the person burn? 3. If a person cross-country skis for 35 min, how many calories will the person burn? 4. How many hours would a person have to jump rope in order to lose 1 lb (Assume calorie consumption is just enough to maintain weight, with no activity.) Heavier people burn more calories (for the same activity), and lighter people burn fewer. In fact, you can calculate similar figures for burning calories by setting up the 5. Assuming that the calories burned are proportional, at what rate would a 120-lb 6. Assuming that the calories burned are proportional, at what rate would a 180-1b appropriate proportion. person burn calories while bicycling at 12 mi/hr? person burn calories while bicycling at 12 mi/hr? 7. Ass uming that the calories burned are proportional, how many hours of jogging at 54 mi/hr would be needed for a 200-lb person to lose 5 lb? (Again, assume calorie consumption is just enough to maintain weight, with no activity.)Explanation / Answer
1.
Jogging 5.5 mi/hr burn 740 cal every hour.
so for 3.5 hours, no. of calories burnt = 740*3.5 = 2,590 cal
2.
Running in place burn 650 cal/ hr
so in 15 min (0.25 hour) no. of calories burnt = 650*0.25 = 162.5 cal
3.
Cross country Skies burn 700 cal/ hr
so in 35 min (35/60 hour) no. of calories burnt = 700*35/60 = 408.33 cal
4.
to lose 1 lb, one has to lose 3,500 calories
jumping rode lose 750 calories per hour
so, to burn 3500, no. of hours required = 3500/750 = 4.67 hours
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