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Physical Activity, Metabolic Risk and the Primary Allostatic Load Mediators: An Explorative Study.

Francis Osei1, Pia-Maria Wippert1,2, Andrea Block1,2

  • 1Medical Sociology and Psychobiology, Department for Physical Activity and Health, University of Potsdam, 14496 Potsdam, Germany.

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Regular physical activity (PA) may alter cortisol levels, a stress mediator, in healthy adults. However, PA did not significantly impact other stress markers or metabolic health indicators in this study.

Keywords:
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Area of Science:

  • Physiology
  • Stress Response
  • Metabolic Health

Background:

  • Chronic stress dysregulates allostatic systems, increasing allostatic load (AL) and metabolic risks.
  • Regular physical activity (PA) is a protective factor against stress and metabolic dysfunction.
  • Understanding PA's impact on AL mediators and metabolic markers is crucial for public health.

Purpose of the Study:

  • To investigate differences in primary allostatic load (AL) mediators and metabolic risk markers between regular and non-regular exercisers in Germany.
  • To explore the relationship between physical activity levels and physiological stress responses.
  • To assess the influence of PA on key metabolic health indicators.

Main Methods:

  • Forty-six healthy adults (18-45 years) were grouped based on weekly PA (≥150 min vs. ≤150 min).
  • Quantified cortisol, epinephrine, norepinephrine, and dehydroepiandrosterone sulfate (DHEA-S) as primary AL mediators.
  • Analyzed differences in mediators and metabolic markers (lipids, BMI, blood pressure) using the Mann-Whitney U test.

Main Results:

  • Regular PA participants showed significantly higher cortisol levels (p=0.01, r=-0.38).
  • No significant differences were found for epinephrine, norepinephrine, DHEA-S, triglycerides, blood pressure, BMI, or HDL-C between groups.
  • Descriptive data suggested potentially favorable lipid profiles at higher PA levels.

Conclusions:

  • Regular PA may be linked to altered cortisol regulation, indicating a potential impact on stress pathways.
  • While not statistically significant, observed trends suggest PA might influence metabolic health markers.
  • Further research with larger, balanced samples is needed to confirm these exploratory findings and understand PA's role in allostatic load and metabolic health.