title: T-Shirt fabric and color affect the physiological strain but not 10 km outdoor running performance.
abstract: 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.
authors.affiliation: Laboratory of Exercise Physiology, School of Physical Education, Physical Therapy and Occupational Therapy, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil - diegoalcantara1@gmail.com.
authors.forename: Diego
authors.initials: D
authors.lastname: DE Alcantara Borba
authors.forename: João B
authors.initials: JB
authors.lastname: Ferreira
authors.forename: Leonardo G
authors.initials: LG
authors.lastname: Coelho
authors.forename: Angelo R
authors.initials: AR
authors.lastname: Martini
authors.forename: Luciana
authors.initials: L
authors.lastname: Lgonçalves Madeira
authors.forename: Daniel B
authors.initials: DB
authors.lastname: Coelho
authors.forename: Luciano S
authors.initials: LS
authors.lastname: Prado
authors.forename: Michael G
authors.initials: MG
authors.lastname: Bemben
authors.forename: Luiz O
authors.initials: LO
authors.lastname: Rodrigues
mesh_terms: D000328:Adult; D054874:Athletic Performance; D001831:Body Temperature; D003020:Clothing; D005260:Female; D006339:Heart Rate; D006358:Hot Temperature; D006801:Humans; D008297:Male; D012420:Running / Q000502:physiology*; D012881:Skin Temperature; D055815:Young Adult