{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,26]],"date-time":"2026-02-26T23:47:45Z","timestamp":1772149665148,"version":"3.50.1"},"reference-count":29,"publisher":"SAGE Publications","issue":"3","license":[{"start":{"date-parts":[[2013,9,1]],"date-time":"2013-09-01T00:00:00Z","timestamp":1377993600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Wilderness &amp; Environmental Medicine"],"published-print":{"date-parts":[[2013,9]]},"abstract":"<jats:sec><jats:title>Objective<\/jats:title><jats:p> The aim of this study was to investigate thermoregulatory, cardiorespiratory, metabolic, and perceptual responses while running in a hot environment (31.7\u00b0 \u00b1 1.0\u00b0C; 42% \u00b1 3% relative humidity) and wearing T-shirts made from different fiber types. <\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p> Eight well-trained men performed 4 tests wearing either a T-shirt made of 100% polyester with 4, 6, or 8 channels, or one made of 100% cotton. Each test consisted of 30 minutes running at 70% of peak oxygen uptake, followed by a ramp test to exhaustion and 15 minutes of recovery. <\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p> There were no differences in skin, core, and body temperatures between fiber types during submaximal and high-intensity running (best P = .08). During recovery, body temperature and shivering\/sweating sensations were lower when wearing 4- and 6-channel fibers ( P \u2264 .04) compared with cotton. The relative humidity at the chest and back were lower for all polyester T-shirts compared with cotton during and after submaximal and maximal running ( P \u2264 .007). Heart rate (best P = .10), oxygen uptake ( P = .95), respiratory exchange ratio (best P = .93), ventilation (best P = .99), and blood lactate concentration (best P = .97) did not differ between the fiber types. Nor were any differences in time to exhaustion (best P = .76), ratings of perceived exertion (best P = .09), thermal sensation (best P = .07), or sensation of clothing wetness (best P = .36) discovered. <\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p> Although statistical analysis revealed lower shivering\/sweating sensations while wearing 4- and 6-channel fiber shirts during recovery, with an improved chest and back microenvironment for all polyester T-shirts, the question remains whether these differences are of any practical relevance because the performance of the well-trained men was unaffected. <\/jats:p><\/jats:sec>","DOI":"10.1016\/j.wem.2013.04.005","type":"journal-article","created":{"date-parts":[[2013,7,16]],"date-time":"2013-07-16T14:48:35Z","timestamp":1373986115000},"page":"211-220","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":20,"title":["Exercising in a Hot 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