Effect of physical training on peripheral sweat production

Area of Science:

• Physiology
• Exercise Science
• Thermoregulation

Background:

• Physical training is known to alter sweating responses.
• The precise mechanisms, particularly peripheral adaptations in sweat glands, require further elucidation.
• Understanding gender-specific differences in sweating is crucial for exercise physiology.

Purpose of the Study:

• To investigate the in vivo secretory activity of sweat glands in sedentary versus endurance-trained individuals.
• To determine the impact of physical training on sweat production and sweat gland function.
• To explore potential gender-related differences in sweat gland response to training.

Main Methods:

• Pilocarpine iontophoresis was used to stimulate and measure peripheral sweat production.
• The study included 40 volunteers: 10 sedentary men, 10 endurance-trained men, 10 sedentary women, and 10 endurance-trained women.
• Maximal oxygen uptake was assessed to correlate with sweat rate.

Main Results:

• Trained individuals exhibited significantly higher peripheral sweat rates compared to sedentary individuals (P < 0.05).
• Peripheral sweat rate showed a significant positive correlation with maximal oxygen uptake (r = 0.73).
• Women demonstrated higher sweat gland density, while men had greater sweat production per gland.

Conclusions:

• Physical training demonstrably improves the secretory activity of human sweat glands, supporting a peripheral mechanism for enhanced sweating.
• The findings indicate that improved sweat gland function contributes to better thermoregulation in trained individuals.
• Significant gender-based differences exist in sweat gland density and individual gland output, influencing overall sudorific response.