Date of Award

2013

Degree Type

Thesis

Degree Name

M.H.K.

Department

Kinesiology

First Advisor

Woodruff, Sarah J.

Keywords

Health and environmental sciences, Air displacement plethysmography, Body fat, Exercise, Thoracic gas volume

Rights

CC BY-NC-ND 4.0

Abstract

The Bod Pod has been found to be both reliable and valid against several criterion methods such as hydrostatic weighing, and dual energy x-ray absorptiometry, and under different conditions, such as clothing level, dehydrated states, and body temperature changes. However, questions still remain regarding the effects of an acute bout of exercise on the Bod Pod. Therefore, the purpose of this study was to determine the effects of an acute bout of exercise on the estimations made by the Bod Pod. Participants (15 males and 22 females) ranged in age from 18-27 years and were currently exercising. Height and weight were measured prior to entering the Bod Pod. Baseline Bod Pod measures were completed followed by a 30 minute cycling trial at 75% of heart rate max. Bod Pod measures were taken immediately following exercise and 2-hr post-exercise. Statistical differences between males and females were found at baseline between height (p<0.001), weight (p<0.001), body volume (p<0.001), and body density (p<0.001). Among males, body mass (p<0.001), %BF (p<0.001), and body volume (p<0.001) decreased while body density (p<0.001) and body temperature (p<0.001) increased directly following exercise; body mass (p<0.001) and body volume (p<0.001) remained lower 2-hr later. Among females, body mass (p <0.001) and body volume (p <0.001) decreased while TGV (p=0.014) and temperature (p<0.001) increased directly following exercise; body mass (p<0.001) and body volume (p<0.001) remained lower yet %BF (p<0.001) and body density (p=0.006) remained higher 2-hr postexercise. These results suggest that a single bout of exercise immediately before Bod Pod testing seems to alter the estimate of %BF, and continues to affect the prediction 2 hours after exercise in females.

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