Thermal Sensitivity To Warmth During Rest and Exercise: A Sex Comparison.

Purpose The study aimed to compare thermal sensation in response to a fixed warm stimulus across 31 body locations in resting and active males and females. Methods Twelve males (20.6 ± 1.0 yrs, 78.1 ± 15.6 kg, 180 ± 8.9 cm, 34.4 ± 5.2 ml•kg-1•min-1) and 12 females (20.6 ± 1.4 yrs, 62.9 ± 5.5 kg, 167 ± 5.7 cm, 36.5 ± 6.6 ml•kg-1•min-1) rested in a thermoneutral (22.2 ± 2.2°C, 35.1 ± 5.8% RH) room whilst a thermal probe (25 cm2), set at 40°C was applied in a balanced order to 31 locations across the body. Participants reported their thermal sensation 10 seconds after initial application. Following this, participants began cycling at 50% 〖"V" ̇"O" 〗_"2max" for 20 minutes, which was then lowered to 30% 〖"V" ̇"O" 〗_"2max" and the sensitivity test repeated. Results Females had significantly warmer magnitude sensations than males at all locations (4.7 ± 1.8 vs 3.6 ± 2.2, p0.05). Conclusion The data provides evidence that the thermal sensation response to warmth varies between genders and between body regions and reduces during exercise. These findings have important implications for clothing design and thermophysiological modellin