title: Validity of resting energy expenditure predictive equations before and after an energy-restricted diet intervention in obese women.
abstract: BACKGROUND
  We investigated the validity of REE predictive equations before and after 12-week energy-restricted diet intervention in Spanish obese (30 kg/m(2)>BMI<40 kg/m(2)) women.
  
  
  METHODS
  We measured REE (indirect calorimetry), body weight, height, and fat mass (FM) and fat free mass (FFM, dual X-ray absorptiometry) in 86 obese Caucasian premenopausal women aged 36.7±7.2 y, before and after (n = 78 women) the intervention. We investigated the accuracy of ten REE predictive equations using weight, height, age, FFM and FM.
  
  
  RESULTS
  At baseline, the most accurate equation was the Mifflin et al. (Am J Clin Nutr 1990; 51: 241-247) when using weight (bias:-0.2%, P = 0.982), 74% of accurate predictions. This level of accuracy was not reached after the diet intervention (24% accurate prediction). After the intervention, the lowest bias was found with the Owen et al. (Am J Clin Nutr 1986; 44: 1-19) equation when using weight (bias:-1.7%, P = 0.044), 81% accurate prediction, yet it provided 53% accurate predictions at baseline.
  
  
  CONCLUSIONS
  There is a wide variation in the accuracy of REE predictive equations before and after weight loss in non-morbid obese women. The results acquire especial relevance in the context of the challenging weight regain phenomenon for the overweight/obese population.
authors: Department of Physical Education and Sport, School of Physical Activity and Sport Sciences, University of Granada, Granada, Spain.
authors: Jonatan R
authors: JR
authors: Ruiz
authors: Francisco B
authors: FB
authors: Ortega
authors: Gerardo
authors: G
authors: Rodríguez
authors: Pilar
authors: P
authors: Alkorta
authors: Idoia
authors: I
authors: Labayen
mesh_terms: D000328:Adult; D015982:Bias; D031204:Caloric Restriction; D004032:Diet; D004734:Energy Metabolism / Q000502:physiology*; D005260:Female; D006801:Humans; D008875:Middle Aged; D008954:Models, Biological; D009765:Obesity / Q000178:diet therapy* / Q000503:physiopathology*; D015203:Reproducibility of Results; D012146:Rest / Q000502:physiology*; D013030:Spain; D055815:Young Adult