Impaired Regulation of Submaximal Force after ACL Reconstruction: Role of Muscle Spindles.
Int J Sports Med
; 42(6): 550-558, 2021 Jun.
Article
em En
| MEDLINE
| ID: mdl-33176382
ABSTRACT
Ongoing motor deficits are routinely present following anterior cruciate ligament (ACL) reconstruction, including the ability to regulate muscle force. While such deficits are known, it is unclear why this occurs. The goal of the current study was to investigate the potential influence of muscle spindle input on submaximal force regulation and muscle activity at the knee in people following ACL reconstruction. Fourteen participants (8 female) who were 6-24 months post-ACL reconstruction and 15 control participants (8 female) undertook submaximal force matching and force modulation tasks before and after 20 min of vibration applied to the patella tendon. Across all tasks, the ACL reconstruction participants were poorer at force matching (P=0.007). The effect of vibration was not significant in either group for the force matching tasks (P=0.06), although there was a reduction in maximum voluntary contraction post-vibration in the control group (P<0.001). The ACL reconstruction group also showed evidence of greater activation of the medial hamstring muscles in comparison to controls (P=0.04). Individuals who have undergone ACL reconstruction have a diminished ability to accurately match and regulate submaximal muscle force, but this does not appear to be related to impaired muscle spindle input. Neuromuscular retraining programs that involve force regulation tasks may be necessary to optimize rehabilitation after ACL reconstruction.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Complicações Pós-Operatórias
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Fusos Musculares
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Força Muscular
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Reconstrução do Ligamento Cruzado Anterior
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Contração Muscular
Tipo de estudo:
Observational_studies
Limite:
Adult
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Female
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Humans
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Male
Idioma:
En
Revista:
Int J Sports Med
Ano de publicação:
2021
Tipo de documento:
Article
País de afiliação:
Nova Zelândia