Purpose: Relative handgrip strength (RHGS), Aged Based on Exercise Stress Testing (A-BEST), and chronological age were evaluated as predictors of impaired mobility in older women.
Methods: Participants included 88 older women (mean age 68.13±6.02 years) referred for exercise stress testing. Estimated physiological age was computed based on exercise capacity, chronotropic reserve index, heart rate recovery, and medication that could affect heart rate. RHGS was measured using a validated handgrip hydraulic dynamometer and mobility was evaluated by timed up and go test (TUG-test). A hierarchical multiple regression predicted TUG-test performance from A-BEST, chronological age and RHGS.
Results: After adjustment for diabetes, RHGS was the only variable to add significantly to the prediction model (p=0.001). An increase in RHGS of 1 kg/body mass index was associated with a decrease in TUG-test of 0.7 seconds.
Conclusion: Relative handgrip strength test was a better predictor of impaired mobility when compared with chronological and physiological age in older women. Moreover, RHGS represents an inexpensive, simple, portable, noninvasive measurement for a clinician when compared with an exercise stress testing.

Keywords: muscle strength, biological age, chronological age, older, functional capacity


中文翻译：

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相对握力，年龄和生理年龄与老年女性功能低下的关系

目的：评估相对握力（RHGS），基于运动压力测试（A-BEST）的年龄和按年龄划分的年龄，作为老年女性活动能力受损的预测指标。
方法：参与者包括88名年龄较大的女性（平均年龄68.13±6.02岁），他们接受了运动压力测试。估计的生理年龄是根据运动能力，变时性储备指数，心率恢复和可能影响心率的药物计算的。RHGS使用经过验证的手柄液压测功机进行测量，并通过计时测试（TUG-test）评估移动性。分层多元回归从A-BEST，年代年龄和RHGS预测了TUG-test的表现。
结果：调整糖尿病后，RHGS是唯一显着增加预测模型的变量（p = 0.001）。RHGS增加1 kg /体重指数与TUG试验降低0.7秒相关。
结论：相对于年龄和生理年龄的老年女性，相对握力测试是运动能力受损的更好预测指标。此外，与运动压力测试相比，RHGS对临床医生而言是一种便宜，简单，便携式，无创的测量方法。

关键字：肌肉力量，生物学年龄，年代年龄，老年人，功能能力