ORIGINAL ARTICLES  EXERCISE PHYSIOLOGY AND BIOMECHANICS 

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

Copyright © 2016 EDIZIONI MINERVA MEDICA

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.