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

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.