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Serum S-100beta response to exercise-heat strain before and after acclimation
Samuel N Cheuvront1, Troy D Chinevere, Brett R Ely
1US Army Research Institute of Environmental Medicine, Natick, MA 01760-5007, USA. samuel.cheuvront@na.amedd.army.mil
Heat acclimation did not alter blood S-100beta protein levels during exercise-heat stress. This study found no significant changes in S-100beta, despite physiological adaptations to heat exposure.
Area of Science:
- Exercise physiology
- Environmental stress response
- Biomarker analysis
Background:
- Exercise and heat stress can increase S-100beta protein.
- The role of heat acclimation in modulating S-100beta response is unclear.
Purpose of the Study:
- To investigate the S-100beta protein response to exercise with heat strain.
- To determine if heat acclimation influences S-100beta levels before and after exercise.
Main Methods:
- Nine males underwent 10 days of heat acclimation (45°C, 20% RH) with treadmill walking.
- Physiological markers (HR, T(re), SR) and serum S-100beta were measured before and after exercise on days 1 and 10.
Main Results:
- Heat acclimation led to significant reductions in heart rate and rectal temperature, and increased sweat rate.
- No significant changes in serum S-100beta concentrations were observed pre- to post-exercise on either day.
- S-100beta levels did not differ between day 1 and day 10, nor correlated with physiological variables.
Conclusions:
- Exercise-heat strain does not consistently elevate S-100beta protein.
- Heat acclimation did not affect S-100beta concentrations despite observed physiological adaptations.
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