Sex-based variations in local sweat response to sunscreens during warm weather exercise
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| Autores: | , |
|---|---|
| Formato: | póster de congreso |
| Fecha de Publicación: | 2024 |
| Descripción: | Thermoregulation through sweating is vital during physical activity to maintain thermal homeostasis and preventhyperthermia. PURPOSE. This study aimed to compare the effects of three sunscreens on localized sweat rate(LSR) during moderate exercise in a warm and humid environment. METHODS. Fifteen physically active subjects (8males, 7 females) underwent a randomized crossover trial evaluating 4 conditions: control (no sunscreen),sunscreen A (organic), and sunscreens B and C (inorganic). LSR was quantified by sweat patches on the scapularregion during 20 min of cycling at 65-75% max HR in 32°C and 55% RH. RESULTS. The control exhibitedsignificantly higher LSR (182 μL/min·dm2) versus sunscreen A (142 μL/min·dm2), B (158 μL/min·dm2), and C (159μL/min·dm2) overall (p<0.05). In males, sunscreen A reduced LSR compared to control, B, and C (p<0.05). Infemales, control was superior to all sunscreens for LSR (p<0.001), with no differences between sunscreenconditions (p>0.05). Sunscreens inhibited LSR during exercise in warm and humid environment relative to control,especially sunscreen A in males and all sunscreens in females. The organic sunscreen A uniquely contained the silicone dimethicone alongside other potentially occlusive agents absent in sunscreens B and C. CONCLUSION. These results suggest that certain supplementary sunscreen ingredients like silicones may induce a dermalocclusive effect that impairs effective sweating. Although localized sweat rate was similar between sexes withoutsunscreen, sunscreen use significantly reduced sweating in females more than males. This suggests physiological sex differences modulate the effect of some sunscreens on thermoregulatory sweating during exercise in heat.Applying sunscreen is essential during outdoor exercise, but some products with high concentrations of occlusiveingredients can interfere with the body's ability to cool itself by sweating. More research is needed to understandhow different sunscreen formulas affect body temperature regulation when exercising in heat. This will helpchoose sunscreens that protect skin while allowing sweating and staying cool during outdoor activities in warm conditions. |
| País: | Kérwá |
| Institución: | Universidad de Costa Rica |
| Repositorio: | Kérwá |
| Lenguaje: | Inglés |
| OAI Identifier: | oai:kerwa.ucr.ac.cr:10669/92027 |
| Acceso en línea: | https://hdl.handle.net/10669/92027 |
| Palabra clave: | SWEATING SUNSCREENS THERMOREGULATION |