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Does exercise give an additional effect in weight reduction regimens?

D Van Dale1, W H Saris, P F Schoffelen

  • 1University of Limburg, Department of Human Biology, Maastricht, The Netherlands.

International Journal of Obesity
|January 1, 1987
PubMed
Summary
This summary is machine-generated.

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Adding exercise to a calorie-restricted diet did not significantly improve weight or fat loss in obese women compared to diet alone. Both groups experienced a decrease in resting metabolic rate (RMR).

Area of Science:

  • Obesity research
  • Exercise physiology
  • Nutritional science

Background:

  • Obesity is a significant health concern requiring effective weight management strategies.
  • Dieting and exercise are common interventions, but their combined effects on metabolic rate and body composition require further investigation.

Purpose of the Study:

  • To investigate the effects of a combined diet and exercise intervention versus diet alone on resting metabolic rate (RMR), body composition, and maximal aerobic power in obese women.

Main Methods:

  • 12 obese women were divided into a diet-only (D) group and a diet plus exercise (DE) group.
  • Intervention involved a low-energy formula diet and a mixed diet over 13 weeks.
  • DE group trained 4 hours/week at 50-60% of maximal aerobic power.
  • Measurements included body composition (hydrostatic weighing), RMR (respiration chamber), and maximal aerobic power (ergometer).

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Main Results:

  • Both groups achieved significant weight and fat loss, with no statistically significant differences between D and DE groups.
  • Both groups showed a significant decrease in RMR per kilogram of fat-free mass (FFM) after 12 weeks.
  • RMR decreased significantly in the D group after 4 weeks, but not in the DE group.

Conclusions:

  • Combining a calorie-restricted diet with regular exercise does not yield superior weight or fat loss compared to diet alone in obese women.
  • Both interventions lead to a reduction in resting metabolic rate, highlighting the importance of preserving metabolic function during weight loss.