University of Hertfordshire

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  • placebo

    Accepted author manuscript, 148 KB, PDF document

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Original languageEnglish
Pages (from-to)362-7
Number of pages6
JournalEuropean Journal of Sport Science
Volume14
Issue4
Early online date29 Jul 2013
DOIs
Publication statusPublished - 19 May 2014

Abstract

This investigation aimed to explore the effects of inert sugar-free drinks described as either 'performance enhancing' (placebo) or 'fatigue inducing' (nocebo) on peak minute power (PMP;W) during incremental arm crank ergometry (ACE). Twelve healthy, non-specifically trained individuals volunteered to take part. A single-blind randomised controlled trial with repeated measures was used to assess for differences in PMP;W, oxygen uptake, heart rate (HR), minute ventilation, respiratory exchange ratio (RER) and subjective reports of local ratings of perceived exertion (LRPE) and central ratings of perceived exertion (CRPE), between three separate, but identical ACE tests. Participants were required to drink either 500 ml of a 'sports performance' drink (placebo), a 'fatigue-inducing' drink (nocebo) or water prior to exercise. The placebo caused a significant increase in PMP;W, and a significant decrease in LRPE compared to the nocebo (p=0.01; p=0.001) and water trials (p=0.01). No significant differences in PMP;W between the nocebo and water were found. However, the nocebo drink did cause a significant increase in LRPE (p=0.01). These results suggest that the time has come to broaden our understanding of the placebo and nocebo effects and their potential to impact sports performance.

Notes

This is an Accepted Manuscript of an article published by Taylor & Francis Group in European Journal of Sport Science on 19 May 2014, available online: http://www.tandfonline.com/doi/abs/10.1080/17461391.2013.822564.

ID: 8756949