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Related Experiment Video

Updated: Jul 26, 2025

Visualization of Intensity Levels to Reduce the Gap Between Self-Reported and Directly Measured Physical Activity
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Physiology of sedentary behavior.

Ana J Pinto1,2, Audrey Bergouignan1,3, Paddy C Dempsey4,5,6,7

  • 1Division of Endocrinology, Metabolism, and Diabetes, Anschutz Health and Wellness Center, University of Colorado Anschutz Medical Campus, Aurora, Colorado, United States.

Physiological Reviews
|June 16, 2023
PubMed
Summary

Reducing sedentary behavior (SB) offers modest health benefits, improving body weight, blood sugar, and cardiovascular markers. Further research is needed to understand the molecular impacts of SB on diverse populations.

Keywords:
active breaksphysical activityphysiologysedentary behaviorsitting

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Area of Science:

  • Physiology
  • Exercise Science
  • Public Health

Background:

  • Sedentary behaviors (SB) involve low energy expenditure during sitting or reclining.
  • Physiological impacts of SB are studied using models like bed rest and reduced physical activity.
  • Excessive SB negatively affects metabolism, cardiovascular health, and body composition.

Purpose of the Study:

  • To examine physiological evidence linking sedentary behavior to various health outcomes.
  • To review the effects of reducing or interrupting prolonged sedentary time.
  • To identify research gaps concerning SB and health in different populations.

Main Methods:

  • Analysis of experimental models: bed rest, immobilization, reduced step count, and SB interruption.
  • Review of physiological data across multiple systems: metabolic, cardiovascular, musculoskeletal, neurological, and immune.
  • Synthesis of findings from studies on adults, older adults, children, and adolescents.

Main Results:

  • Prolonged SB is associated with insulin resistance, vascular dysfunction, reduced fitness, and increased body fat and inflammation.
  • Interventions to reduce/interrupt SB show small but potentially meaningful benefits in adults and older adults.
  • Benefits observed include improvements in body weight, waist circumference, body fat, glucose control, blood lipids, blood pressure, and vascular function.
  • Evidence for other health outcomes and for children/adolescents is more limited.

Conclusions:

  • Reducing sedentary behavior yields modest health improvements, particularly in adults and older adults.
  • Further investigation into molecular mechanisms underlying SB adaptations is warranted.
  • Tailored interventions combining reduced SB and increased physical activity are needed for diverse populations.