Caloric Expenditure
The purpose of the lab is to be able to understand caloric expenditure of the human body. In addition, the lab will also help us develop a regression equation that can be used to predict certain values for VO2 and caloric expenditure of the body.
II. Results
Refer to the caloric expenditure data sheet, regression graph and line.
The regression line obtained from other person cannot be used to determine the caloric expenditure of a person. The regression line obtained from other person cannot be used since the predicted equation comes from another group of values. Predicting values using regression line can only be used to predict certain value from the group of interest and not from other group. For example, if a regression line is obtained to predict disease risk of basketball players, then it cannot be used to predict disease risk of baseball players. Thus, someone elses regression line cannot be used to predict my own caloric expenditure.
The regression line obtained from own caloric expenditure cannot be used to predict values of caloric expenditure from maximal levels of exercise. Regression line can only be used to predict values within a certain range of scores. The regression line cannot be used to predict values from other range of scores. For example, if a regression line is used to predict fat base on the normal height of a person, then the regression line cannot be used to predict fat of a person base on the maximal height. Thus, one cannot use their own regression to estimate their caloric expenditure at maximal levels of exercise.
Table A
Heart Rate (bpm)VO2 (Lmin)STAGE 1 Steady state1111.05STAGE 2 Steady state1321.53STAGE 3 Steady state1451.8 Table B
ActivityHeart Rate (bpm)Estimated VO2 (Lmin)Estimated Caloric Expenditure (kcalmin)Walking1010.622.99Jogging1681.969.46Stair-Climbing1571.748.40Table C
ActivityTime it takes to lose 1 pound of fat - 3500 kcal (min)Walking1169.98Jogging370.10Stair-Climbing416.89 The table shows the time it takes from to lose a pound of fat from different activities. From the table, one can see that it takes shorter time to lose a pound of fat from jogging than from stair-climbing and walking.
III. Closing paragraph
After completing the laboratory, I have learned a lot about estimating caloric expenditures. First, I have learned to create an equation that will help me estimate my VO2. Second, I have learned to calculate for the estimated caloric expenditure from the estimated VO2. Lastly, I have learned using caloric expenditure to estimate the time it takes to lose fat at different activities such as walking, jogging and climbing up stairs. I thought that the method can be applied to different activities such as weightlifting and running.
IV. Data
a. Regression line and scatterplot of VO2 versus Heart rate
Regression Line
VO2 0.02(HR) 1.4, where HR is the heart rate of the person.
b. Estimated VO2 calculations
Heart rate 101
Estimated VO2 0.02HR 1.4
0.02(101) 1.4
2.02 1.4
0.62
Hear rate 168
Estimated VO2 0.02HR 1.4
0.02(168) 1.4
3.36 1.4
1.96
Heart rate 157
Estimated VO2 0.02HR 1.4
0.02(157) 1.4
3.14 1.4
1.74
c. Estimated Caloric Expenditure calculations
VO2 0.62
4.825 kcalLVO2 X 0.62 LVO2min (4.825 kcal X 0.62)min
2.9915 H 2.99
VO2 1.96
4.825 kcalLVO2 X 1.96 LVO2min (4.825 kcal X 1.96)min
9.457 H 9.46
VO2 1.74
4.825 kcalLVO2 X 1.74 LVO2min (4.825 kcal X 1.74)min
8.3955 H 8.40
d. Time it takes to lose fat calculations
Walking (3500 kcalslb)(2.9915 kcalmin)
3500 kcalslb X 1 min2.9915 kcal
3500 min2.9915
1169.9816 minutes
Jogging (3500 kcalslb)(9.457 kcalmin)
3500 kcalslb X 1 min9.457 kcal
3500 min9.457
370.0962 minutes
Stair-Climbing (3500 kcalslb)(8.3955 kcalmin)
3500 kcalslb X 1 min8.3955 kcal
3500 min8.3955
416.89 minutes
Caloric Expenditure Data Sheet
Subject
MinuteSpeed (mph)Elevation ()VO2 (lmin)Heart Rate (bpm)1281.0511122.581.531323381.8145
TABLE A.
Heart Rate (bpm)VO2 (Lmin)STAGE 1 Steady state1111.05STAGE 2 Steady state1321.53STAGE 3 Steady state1451.8
TABLE B.
ActivityHeart Rate (bpm)Estimated VO2 (Lmin)Estimated Caloric Expenditure (kcalmin)Walking1010.622.99Jogging1681.969.46Stair-Climbing1571.748.40
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