Background

The association of back muscle weakness with greater thoracic kyphosis has been widely documented. Reliable and easy-to-use techniques are needed to monitor changes in muscle function over time and assess the effectiveness of therapeutic interventions. Therefore, the present study aimed to evaluate the test-retest reliability of a designed load-cell setup and two clinical tests, namely Ito and Timed loaded standing (TLS) tests for measuring back muscle function (i.e., strength and endurance) in older adults with and without hyperkyphosis.

Method

Fifty-three older people (28 with thoracic hyperkyphosis and 25 normal age-matched controls) completed the present test-retest reliability study. A two-way random model of the Intraclass Correlation Coefficient (ICC_2,3) was used to estimate relative reliability. Absolute reliability was assessed by calculating Standard Error of the Measurements (SEM) and Minimal Detectable Change (MDC).

Results

The findings showed excellent test-retest reliability in all performed tests for this population (ICC = 0.95–0.99). In addition, the MDC values for measuring endurance time via load cell, Ito, and TLS tests in the hyperkyphosis group, were 16.5, 28.2, and 35.1 s, respectively. These values ranged from 36 to 39 s for the control group.

Conclusion

The present study suggests high test-retest reliability of the designed load-cell setup, Ito, and TLS for assessing back extensor muscle strength and endurance in older adults with and or without hyperkyphosis.

中文翻译：

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称重传感器设置、Ito 和定时负载站立测试的重测可靠性，用于测量患有和不患有后凸畸形的老年人的肌肉力量和耐力

背景

背部肌肉无力与更大的胸椎后凸畸形的关联已被广泛记录。需要可靠且易于使用的技术来监测肌肉功能随时间的变化并评估治疗干预的有效性。因此，本研究旨在评估设计的称重传感器设置和两项临床测试的重测可靠性，即 Ito 和定时负荷站立 (TLS) 测试，用于测量老年人背部肌肉功能（即力量和耐力）伴有和不伴有脊柱后凸。

方法

53 名老年人（28 名胸部后凸畸形和 25 名正常年龄匹配的对照组）完成了本次重测信度研究。_{使用类内相关系数 (ICC 2,3} )的双向随机模型来估计相对可靠性。通过计算测量标准误差 (SEM) 和最小可检测变化 (MDC) 来评估绝对可靠性。

结果

结果显示，在对该人群进行的所有测试中，重测信度都非常好（ICC = 0.95-0.99）。此外，后凸组通过称重传感器、Ito 和 TLS 测试测量耐力时间的 MDC 值分别为 16.5、28.2 和 35.1 s。对照组的这些值范围为 36 到 39 秒。

结论

本研究表明，设计的称重传感器设置、Ito 和 TLS 的重测可靠性高，可用于评估患有或不患有后凸畸形的老年人的背部伸肌力量和耐力。