title: Prediction of time-to-exhaustion in the first dorsal interosseous muscle from early changes in surface electromyography parameters.
abstract: BACKGROUND
  In this study we evaluated the precision of the time-to-exhaustion (T(lim)) prediction from the early changes in surface electromyography (sEMG) of the first dorsal interosseous muscle.
  
  
  METHODS
  Thirty subjects performed an index finger isometric abduction at 35% of maximal voluntary contraction (MVC) until exhaustion. Ten participants performed the same exercise at 50% MVC 1 week later. Changes in sEMG parameters across time were modeled using the area-ratio and the linear regression slope. T(lim) was plotted as a function of each of these indices of change, and the coefficient of determination (R(2)) was determined.
  
  
  RESULTS
  Null to moderate R(2) (0.22 and 0.56 at 35% and 50% MVC, respectively) values were calculated. The best T(lim) estimation led to a high prediction error (21.6 ± 15.0% of T(lim) for the 50% MVC task).
  
  
  CONCLUSIONS
  Although the prediction of time-to-exhaustion is an appealing research topic, these results suggest that it cannot be done solely from sEMG.
authors.affiliation: Laboratory Motricité, Interactions, Performance, University of Nantes, Nantes, France.
authors.forename: Killian
authors.initials: K
authors.lastname: Bouillard
authors.forename: Julien
authors.initials: J
authors.lastname: Frère
authors.forename: François
authors.initials: F
authors.lastname: Hug
authors.forename: Arnaud
authors.initials: A
authors.lastname: Guével
mesh_terms: D000293:Adolescent; D000328:Adult; D004576:Electromyography / Q000379:methods*; D005260:Female; D005385:Fingers / Q000502:physiology*; D006801:Humans; D016014:Linear Models; D008297:Male; D008875:Middle Aged; D008954:Models, Biological; D009119:Muscle Contraction / Q000502:physiology; D018763:Muscle Fatigue / Q000502:physiology*; D018482:Muscle, Skeletal / Q000502:physiology*; D011237:Predictive Value of Tests; D013997:Time Factors; D055815:Young Adult