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The Journal of Sports Medicine and Physical Fitness 2016 April;56(4):359-67


lingua: Inglese

T-Shirt fabric and color affect the physiological strain but not 10 km outdoor running performance

Diego DE ALCANTARA BORBA 1, 2, João B. FERREIRA JÚNIOR 1, 3, Leonardo G. COELHO 1, 4, Angelo R. MARTINI 1, Luciana GONÇALVES MADEIRA 1, Daniel B. COELHO 1, Luciano S. PRADO 1, Michael G. BEMBEN 5, Luiz O. RODRIGUES 1

1 Laboratory of Exercise Physiology, School of Physical Education, Physical Therapy and Occupational Therapy, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil; 2 Estadual University of Minas Gerais, Ibirité, Minas Gerais, Brasil; 3 Federal Institute of Education, Science and Technology of Triângulo Mineiro, Paracatu, Minas Gerais, Brazil; 4 Federal Center for Technological Education of Minas Gerais, Timoteo, Minas Gerais, Brazil; 5 Department of Health and Exercise Science, University of Oklahoma, Norman, Oklahoma, USA


BACKGROUND: The aim of the present study was to evaluate the effects of T-Shirt fabric and color on the 10 km outdoor running performance.
METHODS: Six men and six women (mean±SD: age: 27±5 years; height: 1.70±0.13 m; weight: 64.0±12.7 kg; body surface area: 1.73±0.29 m2; Σskinfolds: 107±24 mm; VO2max: 40.2±8.4 mL.kg-1.min-1) took part in five experimental trials, during each of which they wore: 1) no T-shirt (CON); 2) white polyester T-shirt (WP); 3) black polyester T-shirt (BP); 4) white cotton T-shirt (WC); and 5) black cotton T-shirt (BC). Average running velocity (pace) was calculated from each 2 km running time. Rectal, skin and T-shirt temperatures, heart rates and Physiological Strain Index (PSI) were measured before and after the 10 km runs and at the end of each 2 km.
RESULTS: There were no differences in pace, heart rate, rectal and skin temperatures among conditions (P>0.05). PSI was higher in BC and WC conditions when compared to BP and WP conditions. T-shirt temperature was higher for the BC when compared to WP, BP and WC conditions. Rectal temperature and heart rate increased simultaneously with reduced pace throughout self-paced running (P<0.05).
CONCLUSIONS: Despite fabric type T-shirt altered PSI, running performance in the 10 km run was not affected by T-shirt type or color.

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