An Exercise-Induced Improvement In Isolated Skeletal Muscle Contractility Does Not Affect The Performance-Enhancing Benefit Of 70 [Mu]M Caffeine Treatment.

Jason Tallis, Matthew F. Higgins, Valerie Cox, Michael Duncan, Rob James

Research output: Contribution to journalArticle

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Abstract

This study aimed to examine the effects of exercise-induced increases in skeletal muscle contractile performance on isolated skeletal muscle caffeine sensitivity. 30-week old CD1 mice (n=28) either acted as controls or underwent eight weeks of voluntary wheel running. Following the treatment intervention, whole soleus (SOL) or a section of the costal diaphragm (DIA) was isolated from each mouse and tested to determine the effect of 70µM caffeine on work loop power output. Although caffeine elicited a significant increase in power of both the SOL and the DIA, relative to a non-caffeine control, the effect was not different between the experimental groups, despite the muscles of the trained group producing significantly greater muscle power. There was no significant relationship between training volume or baseline work loop power and the caffeine response. These results indicate that an exercise-induced increase in muscle performance did not influence the performance-enhancing effects of caffeine.
Original languageEnglish
Article number190132
JournalJournal of Experimental Biology
Volume221
Early online date17 Sep 2018
DOIs
Publication statusPublished - 5 Nov 2018

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Keywords

  • Ergogenic aid
  • Muscle ageing
  • Work loop
  • Muscle power

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