TITLE

Fat Loss Depends on Energy Deficit Only, Independently of the Method for Weight Loss

AUTHOR(S)
Strasser, B.; Spreitzer, A.; Haber, P.
PUB. DATE
September 2007
SOURCE
Annals of Nutrition & Metabolism;Sep2007, Vol. 51 Issue 5, p428
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Background: This study was designed to compare the effects of 2 different but isocaloric fat reduction programs with the same amount of energy deficit – diet alone or diet combined with aerobic training – on body composition, lipid profile and cardiorespiratory fitness in non- or moderately obese women. Methods: Twenty non- or moderately obese (BMI 24.32 ± 3.11) females (27.3 ± 6.6 years) were tested at the beginning and after an 8-week period of a mild hypocaloric diet for the following parameters: (1) body mass and body fat; (2) total cholesterol, HDL-C, LDL-C and triglycerides; (3) lactate (millimol/liter) during submaximal exertion (100 W); (4) heart rate during submaximal exertion (100 W), and (5) maximum exercise performance (watt). Subjects were randomly divided into either a diet alone (D, –2,095 ± 659 kJ/day) or a diet (–1,420 ± 1,084 kJ/day) plus exercise (DE, three 60-min sessions per week at 60% of VO2max or –5,866 kJ/week) group. Results: Body mass and body fat decreased significantly in D (–1.95 ± 1.13 kg or –1.47 ± 0.87%; p < 0.05) and DE (–2.23 ± 1.28 kg or –1.59 ± 0.87%; p < 0.05), but there was no significant difference observed between the groups. Statistical analysis revealed no significant changes of total cholesterol, HDL-C, LDL-C, triglycerides and heart rate during submaximal exertion (100 W). Lactic acid accumulation during submaximal exertion (100 W) decreased significantly (–0.8 ± 1.4 mmol/l, p < 0.05) in DE and increased significantly (+0.4 ± 0.5 mmol/l, p < 0.05) in D. Maximum exercise performance improved significantly (+12.2 ± 8.8 W, p < 0.05) in DE and did not change significantly in D. Conclusions: This study showed that independently of the method for weight loss, the negative energy balance alone is responsible for weight reduction. Copyright © 2007 S. Karger AG, Basel
ACCESSION #
27701330

 

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