Hopker, J. and Foad, A. and Beedie, C. and Coleman, D.A. and Leach, G. (2010) Placebo effect of an inert gel on experimentally induced leg muscle pain. Open Access Journal of Sports Medicine, 1 . pp. 215-221. ISSN 1179-1543.
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Purpose: This study examined the therapeutic effects of an inert placebo gel on experimentally induced muscle pain in a sports therapy setting. It aimed to investigate the degree to which conditioned analgesia, coupled with an expectation of intervention, was a factor in subsequent analgesia. Methods: Participants were sixteen male and eight female sports therapy students at a UK University. With institutional ethics board approval and following informed consent proce- dures, each was exposed to pain stimulus in the lower leg in five conditions, ie, conditioning, prebaseline, experimental (two placebo gel applications), and postbaseline. In conditioning trials, participants identified a level of pain stimulus equivalent to a perceived pain rating of 6/10. An inert placebo gel was then applied to the site with the explicit instruction that it was an analgesic. Participants were re-exposed to the pain stimulus, the level of which, without their knowledge, had been decreased, creating the impression of an analgesic effect resulting from the gel. In experimental conditions, the placebo gel was applied and the level of pain stimulus required to elicit a pain rating of 6/10 recorded. Results: Following application of the placebo gel, the level of pain stimulus required to elicit a pain rating of 6/10 increased by 8.2%. Application of the placebo gel significantly decreased participant’s perceptions of muscle pain (P = 0.001). Conclusion: Subjects’ experience and expectation of pain reduction may be major factors in the therapeutic process. These factors should be considered in the sports therapeutic environment.
|Subjects:||R Medicine > RC Internal medicine > RC1200 Sports Medicine
B Philosophy. Psychology. Religion > BF Psychology
|Divisions:||Faculties > Social Sciences > School of Sport and Exercise Studies|
|Depositing User:||James Hopker|
|Date Deposited:||21 Jan 2011 09:35|
|Last Modified:||25 Nov 2011 11:53|
|Resource URI:||http://kar.kent.ac.uk/id/eprint/26274 (The current URI for this page, for reference purposes)|
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