Nutr Res Pract.  2017 Feb;11(1):51-56. 10.4162/nrp.2017.11.1.51.

Accuracy of dietary reference intake predictive equation for estimated energy requirements in female tennis athletes and non-athlete college students: comparison with the doubly labeled water method

• Ndahimana
• Lee SH
• Kim YJ
• Son HR
• Ishikawa-Takata K
• Park J
• Kim EK

• KMID: 2395293
• DOI: http://doi.org/10.4162/nrp.2017.11.1.51

Abstract

BACKGROUND/OBJECTIVES
The purpose of this study was to assess the accuracy of a dietary reference intake (DRI) predictive equation for estimated energy requirements (EER) in female college tennis athletes and non-athlete students using doubly labeled water (DLW) as a reference method.
MATERIALS/METHODS
Fifteen female college students, including eight tennis athletes and seven non-athlete subjects (aged between 19 to 24 years), were involved in the study. Subjects' total energy expenditure (TEE) was measured by the DLW method, and EER were calculated using the DRI predictive equation. The accuracy of this equation was assessed by comparing the EER calculated using the DRI predictive equation (EER(DRI)) and TEE measured by the DLW method (TEE(DLW)) based on calculation of percentage difference mean and percentage of accurate prediction. The agreement between the two methods was assessed by the Bland-Altman method.
RESULTS
The percentage difference mean between the methods was -1.1% in athletes and 1.8% in non-athlete subjects, whereas the percentage of accurate prediction was 37.5% and 85.7%, respectively. In the case of athletic subjects, the DRI predictive equation showed a clear bias negatively proportional to the subjects' TEE.
CONCLUSIONS
The results from this study suggest that the DRI predictive equation could be used to obtain EER in non-athlete female college students at a group level. However, this equation would be difficult to use in the case of athletes at the group and individual levels. The development of a new and more appropriate equation for the prediction of energy expenditure in athletes is proposed.

Keyword

Energy metabolism; physical activity; athlete

MeSH Terms

Athletes*
Bias (Epidemiology)
Energy Metabolism
Female*
Humans
Methods*
Motor Activity
Recommended Dietary Allowances*
Sports
Tennis*
Water*
Water

Figure

• 

  Fig. 1 Bland-Altman plots for TEEDLW and EERDRI for athlete (A) and non-athlete (B) participants. TEEDLW, total energy expenditure measured with the DLW method; EERDRI, estimated energy expenditure calculated with the DRI predictive equation.

• 

  Fig. 2 Correlation between TEEDLW and EERDRI in athletic group (A) and non-athletic group (B). TEEDLW, total energy expenditure measured with the DLW method; EERDRI, estimated energy expenditure calculated with the DRI predictive equation.

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