Background

The use of predictive equation of muscular torque can reduce physical effort and time spent during evaluation.

Objectives

To establish, validate, and test the accuracy of a prediction equation to estimate the hip external rotators (HER) torque in adults and older adults by means of hip extensors (HEX) torque measurement.

Methods

Eighty-three healthy adults (development set) were assessed to test the association of HEX and HER torques and to establish the prediction equation. A separate 36 adults and 15 older adults (validation sets) were assessed to test the ability of the equation to estimate HER torque. Hip isometric strength was assessed by a handheld dynamometer.

Results

Simple linear regression analysis revealed that HEX torque was associated with HER torque (r = 0.80; p < 0.0001), resulting in the following prediction equation: HER_torque= −0.02 + (0.58 * HEX_torque). Paired t-test revealed no difference between directly measured and predicted values of HER torque in adults (mean difference = 0.02; 95% CI = −0.115, 0.072) and older adults (mean difference = 0.05; 95% CI = −0.02, 0.12).

Conclusion

The HEX and HER torques were strongly correlated. The prediction equation was valid, accurate, and can be used to estimate HER muscle strength in healthy adults and older adults, requiring only the direct measurement of HEX torque.

中文翻译：

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使用髋部伸肌最大扭矩的测量来预测健康成人和老年人的髋部外旋肌最大扭矩的方程

背景

使用肌肉扭矩的预测方程可以减少评估过程中的体力消耗和时间。

目标

建立、验证和测试预测方程的准确性，以通过髋部伸肌 (HEX) 扭矩测量来估计成人和老年人的髋部外旋肌 (HER) 扭矩。

方法

对 83 名健康成年人（发育组）进行了评估，以测试 HEX 和 HER 扭矩的关联并建立预测方程。对 36 名成人和 15 名老年人（验证集）进行单独评估，以测试方程估计 HER 扭矩的能力。通过手持式测力计评估髋部等长力量。

结果

简单线性回归分析显示，HEX 扭矩与 HER 扭矩相关（r  =  0.80；p  <  0.0001），从而得出以下预测方程：HER_扭矩=  -0.02  +  (0.58 * HEX_扭矩)。配对t检验显示成人（平均差 =  0.02；95% CI  =  -0.115, 0.072）和老年人（平均差 =  0.05；95% CI  =  -0.02, 0.12） HER扭矩的直接测量值和预测值之间没有差异。 ）。

结论

HEX 和 HER 扭矩密切相关。该预测方程有效、准确，可用于估计健康成人和老年人的 HER 肌力，仅需要直接测量 HEX 扭矩。