Resting metabolic rate in obese children before, during and after weight loss.

  • 1 January 1992
    • journal article
    • Vol. 16  (1) , 11-6
Abstract
Resting metabolic rate (RMR) and body composition were measured by indirect calorimetry and body impedance analysis in 14 obese children before weight loss, during weight reduction for 3 weeks with a conventional hypocaloric diet (730 kcal/3050 kJ) and 12 months after weight loss. The initial weight reduction (5.8 +/- 1.2 kg) resulted in a decrease in RMR and fat free mass (FFM) of 17 +/- 10 per cent (P less than 0.001) and 3.1 +/- 2.3 kg (P less than 0.001), respectively. Prior to weight loss (r2 = 0.89, P less than 0.001) and after 12 months follow up (r2 = 0.88, P less than 0.001) RMR correlated positively with FFM. Changes in RMR after 3 weeks weight loss and throughout the follow-up were positively correlated with changes in FFM (r2 = 0.29, P less than 0.05 and r2 = 0.90, P less than 0.001). Our data indicate that RMR in obese children considerably decreased during a 3 weeks weight reduction, but no sustained depression of the metabolic rate after 12 months was found.

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