Training in a Hot Environment Fails to Elicit Changes in the Blood Oxidative Stress Response
| Autor: | Cassie Williamson-Reisdorph, Tiffany Quindry, Katherine Christison, Shae Gurney, Katheryn Tiemessen, John Cuddy, Walter Hailes, Dustin Slivka, Brent Ruby, John Quindry |
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| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Journal of Human Kinetics. 87:81-92 |
| ISSN: | 1899-7562 1640-5544 |
| DOI: | 10.5114/jhk/161586 |
| Popis: | Environmental temperature can impact exercise-induced blood oxidative stress; however, the effects of heat acclimation on this response have not been fully elucidated. The purpose of the study was to investigate the effects of hot (33°C) and room temperature (20°C) environments on post-exercise blood oxidative stress responses following 15 temperature acclimation sessions. Untrained participants (n = 38, 26 7 years, VO2peak = 38.0 7.2 years) completed 15 temperature acclimation sessions of a cycling bout at an intensity perceived as “hard” in either a hot (33°C) or room temperature (20°C) environment. Pre and post acclimation exercise tolerance trials were conducted, which involved cycling at 50% Wpeak for one hour. Blood sampling occurred before exercise, immediately after, two hours, and four hours after the exercise tolerance trials. Blood samples were analyzed for oxidative stress markers including lipid hydroperoxides, 8-isoprostanes, protein carbonyls, 3-nitrotyrosine, ferric-reducing ability of plasma, and Trolox-equivalent antioxidant capacity. Exercise-dependent increases were observed in lipid hydroperoxides, Trolox-equivalent antioxidant capacity, and ferric-reducing ability of plasma (p < 0.001). Considering exercise-induced elevations in markers of blood oxidative stress, there were no differences observed between environmental temperatures before or after the acclimation training period. |
| Databáze: | OpenAIRE |
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