Resting metabolic rate (RMR) accounts for about two thirds of total energy expenditure. The widely used Harris-Benedict equations systematically overestimate RMR.
This study assessed overall reliability and validity of a handheld indirect calorimeter, BodyGem, on a sample of women. Thirty healthy nurses participated in this study with an age of 41.9+/-9.0 years old and a body mass index of 24.0+/- 2.8 kg/m2.
The Deltatrac Metabolic Monitor was used as the criterion method to validate BodyGem. Reliability was estimated by repeated measures of BodyGem to test internal consistency and stability.
Analysis indicated that measurements of Deltatrac and BodyGem are well correlated (r=0.76, P<0.001). The correlation coefficients of two BodyGem RMR measurements were of large statistical significance (r=0.96, P<0.001, mean difference = 15.8+/-55.8 Kcal/d). A significant difference (F =3.81, P=0.04) in repeated measures ANOVA and post hoc revealed a difference between BodyGem and Deltatrac.
There was a systematic difference between both methods (mean difference between BodyGem and Deltatrac =36.4 to 52.2 Kcal/d). After adjustment of additional energy demand by holding BodyGem in position, the difference became non-significant (F =1.62, P=0.22). Bland-Altman plots revealed that there was no significant trend in both methods, and repeated measurements of Bodygem.
In conclusion, RMR obtained using the BodyGem has a high degree of reproducibility and an acceptable validity compared to the Deltatrac.
Metabolic testing provides a precise measurement of your clients RMR, which can account for up to 75% of their total calorie needs.
Metabolism testing is superior to estimation equations, such as
the Harris-Benedict formula and Katch-McArdle formula.
Offer your clients the best possible results by incorporating the BodyGem tools and solutions into your programs.
There isn’t a simpler, more accurate or profitable way to tailor each client’s program for ultimate success.
Providing metabolic testing helps you generate additional revenue, as the average measurement provider charges between $50-$75 for the metabolism test.
For more information about the BodyGem, click on Microlife BodyGem indirect calorimeter.
Or call Harvey Harris at 1-800-743-3328 to discuss BodyGem System Kit pricing options.