Pre-cooling moderately enhances visual discrimination during exercise in the heat
Deutscher übersetzter Titel: | Vorkühlung verbessert moderat die visuelle Wahrnehmung beim Training in großer Hitze |
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Autor: | Clarke, Neil D.; Duncan, Michael Joseph; Smith, Mike; Hankey, Joanne |
Erschienen in: | Journal of sports sciences |
Veröffentlicht: | 35 (2017), 4, S. 355-360, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Elektronische Ressource (online) Gedruckte Ressource |
Sprache: | Englisch |
ISSN: | 0264-0414, 1466-447X |
DOI: | 10.1080/02640414.2016.1164885 |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU201612009263 |
Quelle: | BISp |
Abstract des Autors
Pre-cooling has been reported to attenuate the increase in core temperature, although, information regarding the effects of pre-cooling on cognitive function is limited. The present study investigated the effects of pre-cooling on visual discrimination during exercise in the heat. Eight male recreational runners completed 90 min of treadmill running at 65%
2max in the heat [32.4 ± 0.9°C and 46.8 ± 6.4% relative humidity (r.h.)] on two occasions in a randomised, counterbalanced crossover design. Participants underwent pre-cooling by means of water immersion (20.3 ± 0.3°C) for 60 min or remained seated for 60 min in a laboratory (20.2 ± 1.7°C and 60.2 ± 2.5% r.h.). Rectal temperature (Trec) and mean skin temperature (Tskin) were monitored throughout the protocol. At 30-min intervals participants performed a visual discrimination task. Following pre-cooling, Trec (P = 0.040;
= 0.48) was moderately lower at 0 and 30 min and Tskin (P = 0.003;
= 0.75) lower to a large extent at 0 min of exercise. Visual discrimination was moderately more accurate at 60 and 90 min of exercise following pre-cooling (P = 0.067;
= 0.40). Pre-cooling resulted in small improvements in visual discrimination sensitivity (F1,7 = 2.188; P = 0.183;
= 0.24), criterion (F1,7 = 1.298; P = 0.292;
= 0.16) and bias (F1,7 = 2.202; P = 0.181;
= 0.24). Pre-cooling moderately improves visual discrimination accuracy during exercise in the heat.