Eur J Appl Physiol (2017) 117:1845–1857 DOI 10.1007/s00421-017-3678-x ORIGINAL ARTICLE Cortical voluntary activation testing methodology impacts central fatigue 1,2 3 3 1 José Mira · Thomas Lapole · Robin Souron · Laurent Messonnier · 2 1 Guillaume Y. Millet · Thomas Rupp Received: 3 February 2017 / Accepted: 30 June 2017 / Published online: 7 July 2017 © Springer-Verlag GmbH Germany 2017 Abstract VA change was greater in CONTI than in TRADI TMS Purpose Currently, cortical voluntary activation (VA ) (−29 (15)% [−42, −17] vs. −9 (4)% [−13, −5], respec- TMS is assessed by superimposing transcranial magnetic stimu- tively, P < 0.001). Differences were also observed between lation (TMS) on a maximal voluntary contraction (MVC), TRADI and CONTI for MEP and CSP immediately after 75% MVC and 50% MVC, each contraction being inter- the fatiguing exercise. All differences between the two spersed with 5–10 s of relaxation. Here, we assessed methods disappeared after 2 min of recovery. whether this traditional approach (TRADI) underestimates Conclusion After a 2-min sustained MVC, a few seconds central fatigue due to this short recovery compared to a of recovery change the amount of measured VA and TMS continuous method (CONTI). associated parameters of central fatigue. The continuous Methods VA , motor-evoked potential (MEP),
European Journal of Applied Physiology – Springer Journals
Published: Jul 7, 2017
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