Effects of human head hair on performance and thermoregulatory responses during 10-km outdoor running in healthy men / Efeitos do cabelo da cabeça humana no desempenho e na resposta termorregulatória durante a corrida de 10 km ao ar livre em homens saudáveis
Martini, Angelo Ruediger Pisani; Ferreira-Júnior, João Batista; Borba, Diego Alcantâra; Coelho, Leonardo Gomes Martins; Coelho, Daniel Barbosa; Prado, Luciano Sales.
Rev. bras. cineantropom. desempenho hum
; 18(2): 155-165, Mar.-Apr. 2016. tab, graf
Artículo
en Inglés
| LILACS | ID: lil-783909
Abstract The aim of the present study was to evaluate the effects of human head hair on performance and thermoregulatory responses during 10-km outdoor running in healthy men. Twelve healthy males (29.5 ± 3.7 years, 174.9 ± 4.3 cm, 72.7 ± 3.2 kg and VO2max 44.6 ± 3.4 ml.kg-1.min-1) participated in two self-paced outdoor 10-km running trials separated by 7 days 1) HAIR, subjects ran with their natural head hair; 2) NOHAIR, subjects ran after their hair had been totally shaved. Average running velocity was calculated from each 2-km running time. Rectal temperature, heart rate and physiological strain index were measured before and after the 10-km runs and at the end of each 2 km. The rate of heat storage was measured every 2 km. The environmental stress (WBGT) was measured every 10 min. The running velocity (10.9 ± 1 and 10.9 ± 1.1 km.h-1), heart rate (183 ± 10 and 180 ± 12 bpm), rectal temperature (38.82 ± 0.29 and 38.81 ± 0.49oC), physiological strain index (9 ± 1 and 9 ± 1), or heat storage rate (71.9 ± 64.1 and 80.7 ± 56.7 W.m-1) did not differ between the HAIR and NOHAIR conditions, respectively (p>0.05). There was no difference in WBGT between the HAIR and NOHAIR conditions (24.0 ± 1.4 and 23.2 ± 1.5ºC, respectively; p=0.10). The results suggest that shaved head hair does not alter running velocity or thermoregulatory responses during 10-km running under the sun.
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BR17.1
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