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- W2127029467 abstract "Abstract Objective: To examine the relationship between fasting plasma leptin and 24‐hour energy expenditure (EE), substrate oxidation, and spontaneous physical activity (SPA) in obese subjects before and after a major weight reduction compared with normal weight controls. To test fasting plasma leptin, substrate oxidations, and SPA as predictive markers of success during a standardized weight loss intervention. Research Methods and Procedures: Twenty‐one nondiabetic obese (body mass index: 33.9 to 43.8 kg/m 2 ) and 13 lean (body mass index: 20.4 to 24.7 kg/m 2 ) men matched for age and height were included in the study. All obese subjects were reexamined after a mean weight loss of 19.2 kg (95% confidence interval: 15.1–23.4 kg) achieved by 16 weeks of dietary intervention followed by 8 weeks of weight stability. Twenty‐four‐hour EE and substrate oxidations were measured by whole‐body indirect calorimetry. SPA was assessed by microwave radar. Results: In lean subjects, leptin adjusted for fat mass (FM) was correlated to 24‐hour EE before ( r = −0.56, p < 0.05) but not after adjustment for fat free mass. In obese subjects, leptin correlated inversely with 24‐hour and resting nonprotein respiratory quotient ( r = −0.47, p < 0.05 and r = −0.50, p < 0.05) both before and after adjustments for energy balance. Baseline plasma leptin concentration, adjusted for differences in FM, was inversely related to the size of weight loss after 8 weeks ( r = −0.41, p = 0.07), 16 weeks ( r = −0.51, p < 0.05), and 24 weeks ( r = −0.50, p < 0.05). Discussion: The present study suggests that leptin may have a stimulating effect on fat oxidation in obese subjects. A low leptin level for a given FM was associated with a greater weight loss, suggesting that obese subjects with greater leptin sensitivities are more successful in reducing weight." @default.
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- W2127029467 date "2001-08-01" @default.
- W2127029467 modified "2023-10-18" @default.
- W2127029467 title "Leptin Levels Are Associated with Fat Oxidation and Dietary-Induced Weight Loss in Obesity" @default.
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- W2127029467 doi "https://doi.org/10.1038/oby.2001.59" @default.
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