Abstract

BACKGROUND:

Core strength is an important aspect of physical fitness. A dynamometer was developed to measure isokinetic core muscle strength in multiple planes of motion. Establishing the reliability is needed before it can be used in practice.

OBJECTIVE:

Examine the intra-observer reliability of a trunk isokinetic dynamometer.

METHODS:

31 participants were recruited. Tests were performed twice with an interval of 5–9 days by the same observer. Testing included rotation, flexion/extension and lateral flexion at speeds of 90∘/s and 60∘/s. The main outcome measure was peak torque (PT). The secondary outcomes included peak torque angle (PTA), time to peak torque (TTPT) and compensatory torques (CompTQ). The intra-observer reliability was investigated using intraclass correlation coefficients (ICC).

RESULTS:

Peak torque reliability was good to excellent (ICC = 0.70–0.91), whereas the reliability of the PTA (ICC =-0.04–0.56) and TTPT (ICC = 0.01–0.68) were poor to moderate. CompTQ reliability was moderate to good (ICC = 0.20–0.88).

CONCLUSIONS:

The intra-observer reliability of the isokinetic measurement of core strength peak torque was good. The secondary outcomes peak torque angle and time to peak torque were less reliable and the compensatory torques showed moderate to good reliability. This isokinetic dynamometer could have useful applications in the field of sports medicine and rehabilitation.

中文翻译：

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使用新型等速装置可以可靠地测量核心肌肉力量：一项观察者内部研究

摘要

背景：

核心力量是身体素质的一个重要方面。开发了一种测力计来测量多个运动平面中的等速核心肌肉力量。在实际使用之前，需要建立可靠性。

客观的：

检查躯干等速测力计的内部观察者可靠性。

方法：

招募了31名参与者。测试由同一观察者进行两次，间隔 5-9 天。测试包括以 90 的速度旋转、屈曲/伸展和侧屈∘/s 和 60∘/秒。主要结果测量是峰值扭矩（PT）。次要结果包括峰值扭矩角 (PTA)、峰值扭矩时间 (TTPT) 和补偿扭矩 (CompTQ)。使用组内相关系数（ICC）研究观察者内的可靠性。

结果：

峰值扭矩可靠性从优秀到优秀（ICC=0.70–0.91），而 PTA 的可靠性（ICC=-0.04–0.56) 和 TTPT (ICC=0.01–0.68) 差到中等。CompTQ 可靠性中等至良好（ICC=0.20–0.88)。

结论：

核心力量峰值扭矩等速测量的观察者内可靠性良好。次要结果峰值扭矩角度和达到峰值扭矩的时间不太可靠，补偿扭矩显示出中等至良好的可靠性。这种等速测力计可以在运动医学和康复领域有有用的应用。