Investigating critical torque estimation in untrained participants - Archive ouverte HAL Accéder directement au contenu
Poster De Conférence Année : 2023

Investigating critical torque estimation in untrained participants

Résumé

During an all-out test, peak torques decrease exponentially and reach a plateau corresponding to the critical torque (CT). Similarly, the potentiated doublet evoked torque (PT) follows this pattern, but in some individuals, may slightly recover at the end of the test. We hypothesized that this could influence CT estimation. Thirty-four untrained participants performed an all-out test consisting in 60 isometric maximal voluntary contractions (iMVC) with the plantar flexors. PT and voluntary activation level (VA%) were evaluated every 30s. Participants with PT recovery were allocated to group A (i.e., fourteen participants) and the others to group B. Four methods for estimating CT were compared: i) the average of the last 6 iMVCs, ii) the asymptote of an exponential regression, iii) the minimum of a quadratic regression of the iMVCs profile during the test, and iv) a method of extrapolation between the variations in PT and the variations in iMVC. Compared to group B, group A had similar iMVCs (p=0.384) and similar VA% (p=0.406), but had lower PT amplitudes on average during the test (p=0.023). A group × method interaction (p< 0.001) indicated that, relative to the end-test value, the extrapolation method underestimated CT for group A (-4.6% iMVC) and conversely, overestimated CT (+4.8%) for group B. In conclusion, PT recovery is not an uncommon behavior and influences CT estimation. The regressions and extrapolation methods do not provide robust CT estimations in untrained participants. We recommend using the average of the last 6 iMVCs. However, the extrapolation method should be investigated further.
Fichier principal
Vignette du fichier
LeCorre2023_ACAPS_02.11.2023.pdf (1.7 Mo) Télécharger le fichier
LeCorre_2023.pdf (234.6 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Licence : Domaine public
Origine : Fichiers produits par l'(les) auteur(s)
Licence : Domaine public

Dates et versions

hal-04558519 , version 1 (26-04-2024)

Identifiants

  • HAL Id : hal-04558519 , version 1

Citer

Antonin Le Corre, Nicolas A Turpin, Jérémie Begue, Antoine Mariani, Nathan Caron, et al.. Investigating critical torque estimation in untrained participants. 20ième congrès de l'ACAPS REIMS 2023, Oct 2023, REIMS, France. ⟨hal-04558519⟩
0 Consultations
0 Téléchargements

Partager

Gmail Facebook X LinkedIn More