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Obesity and physical activity.

K R Westerterp1

  • 1Department of Human Biology, Maastricht University, The Netherlands. k.westerterp@hb.unimaas.nl

International Journal of Obesity and Related Metabolic Disorders : Journal of the International Association for the Study of Obesity
|April 8, 1999
PubMed
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Obese individuals are often moderately active, and increasing physical activity alone does not lead to weight loss. Significant weight loss in obesity requires a calorie-restricted diet, with physical activity supporting energy expenditure.

Area of Science:

  • Obesity research
  • Exercise physiology
  • Nutritional science

Background:

  • Obesity is a complex health issue with multifactorial causes.
  • Understanding the interplay between obesity, physical activity, and energy balance is crucial for effective management.
  • Previous research has explored various strategies for weight management in obese populations.

Purpose of the Study:

  • To review the relationship between obesity and physical activity levels.
  • To investigate methods for increasing physical activity in obese individuals.
  • To evaluate the effects of combined physical activity increases and energy intake reduction on weight management.

Main Methods:

  • Objective assessment of activity-associated energy expenditure using doubly labeled water.

Related Experiment Videos

  • Analysis of physical activity levels in relation to body mass index (BMI).
  • Review of the impact of exercise training programs on body composition in obese subjects.

    • Main Results:

    • Activity-associated energy expenditure positively correlates with BMI.
    • Obese individuals are generally moderately active, with limitations in high-intensity exercise capacity.
    • Current exercise interventions do not consistently result in weight loss, as fat mass loss is often offset by fat-free mass gain.

    Conclusions:

    • Significant weight loss in obese individuals is primarily achieved through dietary energy restriction.
    • Even mild energy restriction can lead to substantial weight loss with adherence.
    • Increased physical activity is essential to counteract reduced activity-induced energy expenditure and should be supported by reduced body mass.