Accéder directement au contenu Accéder directement à la navigation
Article dans une revue

Bilateral differences in hamstring coordination in previously injured elite athletes

Abstract : Hamstring strain injuries (HSIs) involve tissue disruption and pain, which can trigger long-term adaptations of muscle coordination. However, little is known about the effect of previous HSIs on muscle coordination and in particular, after the completion of rehabilitation and in the absence of symptoms. This study aimed to determine if elite athletes with a prior unilateral HSI have bilateral differences in coordination between the hamstring muscle heads after returning to sport. Seventeen athletes with a unilateral history of biceps femoris (BF) injury participated in the experiment. Surface electromyography was recorded from three hamstring muscles [BF, semimembranosus (SM), and semitendinosus] during submaximal isometric torque-matched tasks at 20% and 50% of maximal voluntary contraction. The product of normalized electromyographic amplitude with functional physiological cross-sectional area (PCSA) and moment arm was considered as an index of individual muscle torque. The contribution of the injured muscle to total knee flexion torque was lower in the injured than the uninjured limb (−5.6 ± 10.2%, P = 0.038). This reduced contribution of BF was compensated by a higher contribution of the SM muscle in the injured limb (+5.6 ± 7.5%, P = 0.007). These changes resulted from a lower contribution of PCSA from the injured muscle (BF) and a larger contribution of activation from an uninjured synergist muscle (SM). In conclusion, bilateral differences in coordination were observed in previously injured athletes despite the completion of rehabilitation. Whether these bilateral differences in hamstring coordination could constitute an intrinsic risk factor that contributes to the high rate of hamstring injury recurrence remains to be investigated.
Liste complète des métadonnées

Littérature citée [45 références]  Voir  Masquer  Télécharger

https://hal-insep.archives-ouvertes.fr/hal-02975022
Contributeur : Valérie Quaireau <>
Soumis le : jeudi 22 octobre 2020 - 12:13:48
Dernière modification le : mardi 27 octobre 2020 - 03:30:07

Fichier

AVRILLON_HUG_GUILHEM_jap_2020....
Fichiers produits par l'(les) auteur(s)

Identifiants

Collections

Citation

Simon Avrillon, François Hug, Gaël Guilhem. Bilateral differences in hamstring coordination in previously injured elite athletes. Journal of Applied Physiology, American Physiological Society, 2020, 128 (3), pp.688-697. ⟨10.1152/japplphysiol.00411.2019⟩. ⟨hal-02975022⟩

Partager

Métriques

Consultations de la notice

50

Téléchargements de fichiers

71