J Sport Rehabil. 2020 Nov 1;29(8):1218-1221. doi: 10.1123/jsr.2019-0255. Epub 2020 Feb 5.
Strength assessment is essential to prescribe exercise in sports and rehabilitation. Low-cost valid equipment may allow continuous monitoring of training.
To examine the validity of a very low-cost hanging scale by comparing differences in the measures of peak force to a laboratory grade load cell during shoulder abduction, flexion, extension, and internal and external rotations.
Analytical study.
Thirty-two healthy subjects (18 women, age 26 [10] y, height 172 [8] cm, mass 69 [13] kg, body mass index 23 [4] kg/m2).
The dependent variable was the maximal peak force (in kilogram-force). The independent variable was the instrument (laboratory grade load cell and hanging scale).
No differences were observed while comparing the results. The intraclass correlation coefficients1,1 ranged from .96 to .99, showing excellent results. The Cronbach alpha test also returned >.99 for all comparisons. The SEM ranged from 0.02 to 0.04 kgf, with an averaged SD from 0.24 to 0.38 kgf. The correlation was classified as high for all tested movements (r > .99; P < .001), with excellent adjusted coefficients of determination (.96 < r2 < .99). Bland-Altman results showed high levels of agreement with bias ranging from 0.27 to 0.48.
Hanging scale provides valid measures of isometric strength with similar output measures as laboratory grade load cell.
力量评估对于运动和康复中的运动处方至关重要。低成本的有效设备可以实现训练的连续监测。
通过比较肩外展、前屈、后伸、内收和外展时峰值力在非常低价位的悬挂秤和实验室级负载单元上的测量值，来检验该非常低价位悬挂秤的有效性。
分析性研究。
32 名健康受试者（18 名女性，年龄 26[10]岁，身高 172[8]cm，体重 69[13]kg，身体质量指数 23[4]kg/m2）。
因变量为最大峰值力（千克力）。自变量为仪器（实验室级负载单元和悬挂秤）。
在比较结果时，未观察到差异。组内相关系数 1,1 范围为.96 至.99，显示出极好的结果。克朗巴赫 α 检验对于所有比较的结果也>.99。SEM 范围为 0.02 至 0.04 kgf，平均 SD 范围为 0.24 至 0.38 kgf。所有测试运动的相关性均被归类为高（r >.99；P <.001），调整后的决定系数（.96 < r2 <.99）极好。Bland-Altman 结果显示出高的一致性水平，偏差范围为 0.27 至 0.48。
悬挂秤可提供等长力量的有效测量值，其输出与实验室级负载单元相似。
