Influence of the menstrual cycle on body composition determined by air displacement plethysmography (Bod Pod®)

Graduation Date

2008

Document Type

Thesis

Program

Other

Program

Thesis (M.S.)--Humboldt State University, Kinesiology-Exercise Science, 2008

Committee Chair Name

Kathy D. Munoz

Committee Chair Affiliation

HSU Faculty or Staff

Keywords

Humboldt State University -- Theses -- Kinesiology, Body fat percentage, Bod Pod, Menstrual cycle, Body composition, Air displacement plethysmography, Total body weight

Abstract

The purpose of this study was to determine if there were significant fluctuations in body composition during a normal menstrual cycle using air displacement plethysmography (Bod Pod®). Seventeen college age females were tested five times over one menstrual cycle. ANOVA Generalized Linear Models of repeated measures was used to detect changes in body fat percentage (BF%), lean weight (LW), and total body weight (BW). Test-retest for all repeated measures taken of BF%, LW, and BW were acceptable. Equality of covariance within subjects by Box‟s M Test was not violated for BF% (p = .995), LW (p = .956), and BW (p = 1.00). Mauchly‟s Test for sphericity was violated in BF% (p = .032) and BW (p = .010), thus epsilon adjustments were evaluated for appropriate F-value corrections resulting in a finding of no significance. There were no significant fluctuations in body composition during the menstrual cycle and therefore no adjustments in the timing of body composition assessment should be necessary.

https://scholarworks.calstate.edu/concern/theses/08612q80x

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