Resistance exercise in a hot environment alters serum markers in untrained males

Eskandari, Arezoo, Fashi, Mohamad, Saeidi, Ayoub, Boullosa, Daniel, Laher, Ismail, Ben Abderrahman, Abderraouf, Jabbour, Gerorges, and Zouhal, Hassane (2020) Resistance exercise in a hot environment alters serum markers in untrained males. Frontiers in Physiology, 11. 597.

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Purpose:We examined the effects of moderate resistance exercise (RE) on serum cortisol, testosterone, extracellular heat shock protein (HSP70), and interleukin (IL)-6 and IL-15 concentrations in untrained males in a hot environment. Methods:Ten untrained young males (26 +/- 3 years; 75.8 +/- 6 kg; 177.4 +/- 5.3 cm) performed two series of full body RE [3 sets of 8 to 10 repetitions, 30-60 s recovery between series with 70% of one maximal repetition (1-RM), with a rest period of 1 to 3 min between exercises] carried out in a random order in both heated (similar to 35 degrees C) and thermoneutral (22 degrees C) conditions. Serum concentrations of testosterone, cortisol, HSP70, and IL-6 and IL-15 were measured before, at the end, and 1 h after RE sessions. Participants in both groups consumed 4 ml of water/kg body mass every 15 min. Results:There were time-related changes in testosterone, HSP70, and IL-6 (P< 0.001), and cortisol and IL-15 (P< 0.05). Levels of cortisol, HSP70, and IL-6 increased immediately for RE at 35 degrees C, and testosterone and IL-15 levels were decreased. Changes in serum testosterone, HSP70, cortisol, and IL-15 and IL-6 levels were reversed after 1 h. A significant time x condition interaction was observed for IL-15 and HSP70 (P< 0.001), cortisol and IL-6 (P< 0.05), but not for testosterone (P> 0.05). Conclusion:RE in a heated environment may not be appropriate for achieving muscle adaptations due to acute changes of hormonal and inflammatory markers.

Item ID: 64005
Item Type: Article (Research - C1)
ISSN: 1664-042X
Keywords: cytokines, heat, resistance exercise, hypertrophy, nterleukin 6, Interleukin 15, untrained young
Copyright Information: Copyright © 2020 Eskandari, Fashi, Saeidi, Boullosa, Laher, Ben Abderrahman, Jabbour and Zouhal. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
Date Deposited: 05 Aug 2020 07:49
FoR Codes: 42 HEALTH SCIENCES > 4207 Sports science and exercise > 420702 Exercise physiology @ 100%
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