Pan Fumin, Cheng Jingbo, Kong Chao, Wang Wei, Lu Shibao
Department of Orthopedics, Xuanwu Hospital, Capital Medical University, Changchun Rd. 45, Beijing, 100053, People's Republic of China.
National Clinical Research Center for Geriatric Diseases, Beijing, China.
Eur J Med Res. 2025 Jun 10;30(1):471. doi: 10.1186/s40001-025-02742-w.
The trunk muscles play an important role in generating motion and maintaining posture stability. We aimed to investigate the sex-dependent differences in the three-dimensional isometric and isokinetic trunk muscle strength.
We included 122 asymptomatic participants (61 males and 61 females) aged from 20 to 35 years and used the BioniX Sim3 Pro device to measure the three-dimensional isometric and isokinetic trunk muscle strength.
Males displayed greater absolute isometric trunk torques than females (P < 0.05), which vanished after normalized to body weight (P > 0.05). The isometric torque was greatest during extension, then during flexion, lateral bending came next and axial rotation came least (P < 0.05). During isokinetic movements at 15°/s, males in contrast displayed lower trunk torques than females in each direction, both before and after normalized to body weight (P < 0.05). The isokinetic trunk torque decreased with an increasing velocity from 15°/s to 45°/s (P < 0.05), which showed no significant difference between 45°/s and 75°/s (P > 0.05). The isokinetic trunk torque was greatest during extension, then during flexion, lateral bending and then during axial rotation when moving at 15°/s (P < 0.05), and this sequence changed during movements at 45°/s and 75°/s.
We created a database concerning the isometric and isokinetic trunk torques in an asymptomatic adult cohort. The results could be provided as physiological references in the future for comparison between subjects with and without trunk muscle impairments.
躯干肌肉在产生运动和维持姿势稳定性方面发挥着重要作用。我们旨在研究三维等长和等速躯干肌肉力量的性别差异。
我们纳入了122名年龄在20至35岁之间的无症状参与者（61名男性和61名女性），并使用BioniX Sim3 Pro设备测量三维等长和等速躯干肌肉力量。
男性的绝对等长躯干扭矩大于女性（P < 0.05），但在按体重归一化后这种差异消失（P > 0.05）。等长扭矩在伸展时最大，其次是屈曲，然后是侧屈，轴向旋转时最小（P < 0.05）。在15°/s的等速运动中，男性在每个方向上的躯干扭矩均低于女性，无论按体重归一化前后（P < 0.05）。等速躯干扭矩随着速度从15°/s增加到45°/s而降低（P < 0.05），在45°/s和75°/s之间无显著差异（P > 0.05）。在15°/s运动时，等速躯干扭矩在伸展时最大，其次是屈曲、侧屈，然后是轴向旋转（P < 0.05），而在45°/s和75°/s运动时这个顺序发生了变化。
我们建立了一个关于无症状成年人群等长和等速躯干扭矩的数据库。这些结果可为未来比较有和没有躯干肌肉损伤的受试者提供生理参考。
