Sex differences in quadriceps rate of torque development within 1â¯year of ACL reconstruction.
Phys Ther Sport
; 38: 36-43, 2019 Jul.
Article
em En
| MEDLINE
| ID: mdl-31042614
ABSTRACT
OBJECTIVES:
To investigate the effect of sex on measures of quadriceps strength, rate of torque development, and knee function during the first year following ACLR.DESIGN:
Cross-sectional;SETTING:
University community;PARTICIPANTS:
Sixty individuals (29 men) with unilateral ACLR in the last 12 months. MAIN OUTCOMEMEASURES:
Participants completed bilateral knee extension maximal voluntary isometric contraction (MVIC, Nm/kg) strength assessments. Rates of torque development (Nm*kg-1*s-1) were assessed from contraction initiation to 100â¯ms (RTD100) and from 100â¯ms to 200â¯ms after contraction initiation (RTD200). The effects of sex MVIC strength, RTD, and limb symmetry were assessed using separate ANCOVAs.RESULTS:
Women displayed weaker involved limb (Menâ¯=â¯2.72⯱â¯0.72 Nm*kg-1, Womenâ¯=â¯2.01⯱â¯0.50 Nm*kg-1, pâ¯<â¯0.001) and contralateral limb (Menâ¯=â¯3.15⯱â¯0.52 Nm*kg-1, Womenâ¯=â¯2.66⯱â¯0.58 Nm*kg-1, pâ¯<â¯0.001) MVIC, and slower involved limb RTD100 (Menâ¯=â¯8.36⯱â¯3.16 Nm*kg-1*s-1, Womenâ¯=â¯6.50⯱â¯2.41 Nm*kg-1*s-1, pâ¯=â¯0.01) and RTD200 (Menâ¯=â¯9.49⯱â¯3.45 Nm*kg-1*s-1, Womenâ¯=â¯9.49⯱â¯3.45 Nm*kg-1*s-1, pâ¯<â¯0.001) when compared to men.CONCLUSIONS:
Within the first year after ACLR, women displayed bilateral quadriceps weakness and slower involved limb quadriceps RTD when compared to men. Specific focus on facilitating quadriceps hypertrophy and improving neural drive to the quadriceps is indicated when treating female patients attempting to make a return to sport after ACLR.Palavras-chave
Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Debilidade Muscular
/
Músculo Quadríceps
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Terapia por Exercício
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Força Muscular
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Reconstrução do Ligamento Cruzado Anterior
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Contração Isométrica
Idioma:
En
Ano de publicação:
2019
Tipo de documento:
Article