Barrué-Belou Simon, Démaret Marc-Antoine, Wurtz Alexis, Ducloux Alicia, Fourchet François, Bothorel Hugo
Physiotherapy Department and Motion Analysis Lab, Swiss Olympic Medical Center, La Tour Hospital, Meyrin, Switzerland.
Sports University Clinic, Toulouse University Hospital, Toulouse, France.
Arthrosc Sports Med Rehabil. 2024 Jan 12;6(1):100861. doi: 10.1016/j.asmr.2023.100861. eCollection 2024 Feb.
To provide normative values of maximal isometric torque of knee extensors and flexors measured at 80° of knee flexion and to characterize the results in healthy subjects practicing activities at risk of anterior cruciate ligament rupture.
Seventy-four trained volunteers (35 male and 39 female) aged 18 to 41 years were recruited. They alternately performed 3 maximal voluntary isometric contractions of knee extension and flexion. The maximal voluntary isometric contraction net torque was computed as the mean value of the peak torques recorded over the 3 trials.
For women, the absolute torque for extensors was 143.5 ± 34.4 N⋅m (range, 87.7-253.1 N⋅m) and 66.8 ± 13.8 N⋅m (range, 37.5-93.1) for flexors. For men, the absolute torque for extensors was 199.8 ± 47.3 N⋅m (range, 99.3-311.5 N⋅m) and 89.8 ± 21.0 N⋅m (range, 51.8-137.2 N⋅m) for flexors. For women, the body mass normalized torque for extensors was 2.20 ± 0.51 N⋅m.kg (range, 1.22-3.74 N⋅m.kg) and 1.04 ± 0.26 N⋅m.kg (range, 0.41-1.50 N⋅m.kg) for flexors. For men, the normalized torque for extensors was 2.74 ± 0.58 N⋅m.kg (range, 1.51-4.08 N⋅m.kg) and 1.24 ± 0.30 N⋅m.kg (range, 0.64-2.05 N⋅m.kg) for flexors.
This study provides absolute and normalized normative values of maximal isometric torque measured at 80° of knee flexion for extensors and flexors in a series of healthy trained subjects practicing activities at risk of anterior cruciate ligament rupture. The considerable level of interlimb asymmetry and the weak association between dominance and strength observed in uninjured subjects call into question the classical use of contralateral side as reference for injured patients.
Patients with anterior cruciate ligament (ACL) injuries are the most represented subjects using isokinetic dynamometers in many sport medicine and rehabilitation departments. Clinicians need reference values to compare patients with ACL injuries with comparable healthy subjects. This study may provide this information.
提供在膝关节屈曲80°时测量的膝关节伸肌和屈肌最大等长扭矩的标准值，并描述从事有前交叉韧带断裂风险活动的健康受试者的结果特征。
招募了74名年龄在18至41岁之间的受过训练的志愿者（35名男性和39名女性）。他们交替进行3次膝关节伸展和屈曲的最大自主等长收缩。最大自主等长收缩净扭矩计算为3次试验中记录的峰值扭矩的平均值。
女性伸肌的绝对扭矩为143.5±34.4N·m（范围87.7 - 253.1N·m），屈肌为66.8±13.8N·m（范围37.5 - 93.1）。男性伸肌的绝对扭矩为199.8±47.3N·m（范围99.3 - 311.5N·m）’屈肌为89.8±21.0N·m（范围51.8 - 137.2N·m）。女性伸肌的体重标准化扭矩为2.20±0.51N·m·kg（范围1.22 - 3.74N·m·kg），屈肌为1.04±0.26N·m·kg（范围0.41 - 1.50N·m·kg）。男性伸肌的标准化扭矩为2.74±0.58N·m·kg（范围1.51 - 4.08N·m·kg），屈肌为1.24±0.30N·m·kg（范围0.64 - 2.05N·m·kg）。
本研究提供了一系列从事有前交叉韧带断裂风险活动的健康训练受试者在膝关节屈曲80°时伸肌和屈肌最大等长扭矩的绝对和标准化标准值。在未受伤受试者中观察到的相当程度的肢体间不对称以及优势与力量之间的弱关联，使人们对将对侧作为受伤患者参考的传统用法产生质疑。
在前交叉韧带（ACL）损伤患者是许多运动医学和康复科室使用等速测力计的最主要人群。临床医生需要参考值来将ACL损伤患者与健康对照者进行比较。本研究可能提供此信息。
