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- Title
Reliability of BOD POD Measurements Remains High After a Short-Duration Low-Carbohydrate Diet.
- Authors
Kjerulf Greer, Beau; Edsall, Kathleen M.; Greer, Anna E.
- Abstract
The purpose of the current study was to determine whether expected changes in body weight via a 3-day low-carbohydrate (LC) diet will disrupt the reliability of air displacement plethysmography measurements via BOD POD. Twenty-four subjects recorded their typical diets for 3 days before BOD POD and 7-site skinfold analyses. Subjects were matched for lean body mass and divided into low-CHO (LC) and control (CON) groups. The LC group was given instruction intended to prevent more than 50 grams/day of carbohydrate consumption for 3 consecutive days, and the CON group replicated their previously recorded diet. Body composition measurements were repeated after dietary intervention. Test-retest reliability measures were significant (p < .01) and high for body fat percentage in both the LC and the CON groups (rs = .993 and .965, respectively). Likewise, skinfold analysis for body fat percentage reliability was high in both groups (rs = .996 and .997, respectively). There were significant differences between 1 st and 2nd BOD POD measurements for body mass (72.9 ± 13.3 vs. 72.1 ± 13.0 kg [M ± SD]) and body volume (69.0 ± 12.7-68.1 ± 12.2 L) in the LC group (p < .05). However, there were no differences (p > .05) in BOD POD-determined body fat percentage, lean body mass, or fat mass between the 1st and 2nd trial in either group. Body composition measures via BOD POD and 7-site skinfolds remain reliable after 3 days of an LC diet despite significant decreases in body mass.
- Subjects
BODY composition; ADIPOSE tissues; BODY weight; STATISTICAL correlation; LONGITUDINAL method; LOW-carbohydrate diet; PLETHYSMOGRAPHY; PROBABILITY theory; SKINFOLD thickness; STATISTICS; STATISTICAL power analysis; DATA analysis; STATISTICAL reliability; REPEATED measures design; FOOD diaries; LEAN body mass; DESCRIPTIVE statistics; EQUIPMENT &; supplies
- Publication
International Journal of Sport Nutrition & Exercise Metabolism, 2016, Vol 26, Issue 2, p145
- ISSN
1526-484X
- Publication type
Article
- DOI
10.1123/ijsnem.2015-0184