European Journal of Applied Physiology

, Volume 112, Issue 1, pp 377–385

Deception of ambient and body core temperature improves self paced cycling in hot, humid conditions

  • Paul C. Castle
  • Neil Maxwell
  • Alan Allchorn
  • Alexis R. Mauger
  • Danny K. White
Original Article

DOI: 10.1007/s00421-011-1988-y

Cite this article as:
Castle, P.C., Maxwell, N., Allchorn, A. et al. Eur J Appl Physiol (2012) 112: 377. doi:10.1007/s00421-011-1988-y

Abstract

We used incorrect visual feedback of ambient and core temperature in the heat to test the hypothesis that deception would alleviate the decrement in cycling performance compared to a no deception trial. Seven males completed three 30 min cycling time trials in a randomised order on a Kingcycle ergometer. One time trial was in temperate, control conditions (CON: 21.8 ± 0.6°C; 43.3 ± 4.3%rh), the others in hot, humid conditions (HOT: 31.4 ± 0.3°C; 63.9 ± 4.5%rh). In one of the hot, humid conditions (31.6 ± 0.5°C; 65.4 ± 4.3%rh), participants were deceived (DEC) into thinking the ambient conditions were 26.0°C; 60.0%rh and their core temperature was 0.3°C lower than it really was. Compared to CON (16.63 ± 2.43 km) distance covered was lower in HOT (15.88 ± 2.75 km; P < 0.05), but DEC ameliorated this (16.74 ± 2.87 km; P < 0.05). Mean power output was greater in DEC (184.4 ± 60.4 W) than HOT (168.1 ± 54.1 W; P < 0.05) and no difference was observed between CON and DEC. Rectal temperature and iEMG of the vastus lateralis were not different, but RPE in the third minute was lower in DEC than HOT (P < 0.05). Deception improved performance in the heat by creating a lower RPE, evidence of a subtle mismatch between the subconscious expectation and conscious perception of the task demands.

Keywords

Electromyography Hyperthermia Time trial Central governor Non-contingent feedback 

Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • Paul C. Castle
    • 1
  • Neil Maxwell
    • 2
  • Alan Allchorn
    • 2
  • Alexis R. Mauger
    • 1
  • Danny K. White
    • 2
  1. 1.Department of Sport and Exercise Science, ISPARUniversity of BedfordshireBedfordUK
  2. 2.Chelsea School Research CentreUniversity of BrightonEastbourneUK