Passive Heat Maintenance After an Initial Warm-up Improves High-Intensity Activity During an Interchange Rugby League Movement Simulation Protocol

• Matthew Fairbank ^[1] ; Jamie M. Highton ^[1] ; Craig Twist
  1. [1] University of Chester

     University of Chester

     Reino Unido

     
• Localización: Journal of strength and conditioning research: The Official Research Journal of the NSCA, ISSN 1064-8011, Vol. 35, Nº. 7, 2021, págs. 1981-1986
• Idioma: inglés
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• Resumen

  • This study examined using passive heat maintenance (PHM) to maintain core temperature after a warm-up and its effect on simulated first half running performance in rugby players. Thirteen male rugby players completed this randomized crossover study. Tympanic temperature was taken before a warm-up and then after a further 15 minutes of passive recovery either with (PHM) or without (CON) a PHM garment. Subjects then completed 23 minutes of the rugby league movement simulation protocol (RLMSP-i). Differences in tympanic temperature were unclear between CON and PHM before (35.7 +/- 1.3 cf. 36.0 +/- 1.1[degrees] C; effect size [ES] = 0.20) and during exercise (34.5 +/- 0.1 cf. 35.2 +/- 0.1[degrees] C; ES = 0.26-0.35). High-intensity running (ES = 0.27) and peak sprint speed were higher (ES = 0.46-0.56) during the PHM compared with the CON trial. Time spent above 20 W[middle dot]kg-1 also increased in the first quartile of the PHM compared with the CON trial (ES = 0.18). All other between trial comparisons of performance were unclear. HRmean (ES = 0.38) was higher in PHM compared with CON, while differences in RPEmean (ES = -0.19) were unclear. There are small to large increases in high-intensity activity performed during a playing bout when rugby players wear a PHM garment after a warm-up. Rugby players should consider PHM during extended periods between a warm-up and starting a match.