Mahato Niladri Kumar, Davis Alexandria, Simon Janet E, Clark Brian C
Ohio Musculoskeletal and Neurological Institute (OMNI), Ohio University, Athens, OH, United States.
Department of Biomedical Sciences, Ohio University Heritage College of Osteopathic Medicine, Athens, OH, United States.
Front Aging. 2024 Mar 6;5:1302574. doi: 10.3389/fragi.2024.1302574. eCollection 2024.
Timed chair rise tests are frequently used as a substitute for assessing leg muscle strength or power. To determine if timed chair rise tests are an indicator of lower extremity muscle power, we examined the relationship between the repetitions completed in a 30-s chair rise test and the power generated during the test. Seventy-five individuals participated in this study (n = 30 < 65 years and 45 ≥ 65 years). Participants underwent a 30-s chair rise test while instrumented with a power analyzer. Handgrip strength was also evaluated. The relationship between chair rise repetitions and chair rise power was = 0.32 ( < 0.001). Chair rise repetitions when regressed on a (i.e., summed) chair rise power, it yielded = 0.70 with data from all participants combined ( < 0.001). A mediation analysis indicated that anthropometrics partially mediates the relationship between chair rise repetitions and total chair rise power accounting for 2.8%-6.9% of the variance. Our findings indicate that in older adults, the overall performance of chair rises offers limited information about the average power per rise but is more indicative of the cumulative power exerted. Thus, the total number of chair rises in a 30-s test is likely a more comprehensive metric of overall muscular power, reflecting endurance aspects as well. Additionally, we found that personal physical attributes, such as height and weight, partially influence the link between chair rise count and total power, highlighting the importance of factoring in individual body metrics in assessments of muscular performance.
定时起立试验经常被用作评估腿部肌肉力量或功率的替代方法。为了确定定时起立试验是否是下肢肌肉功率的一个指标，我们研究了在30秒起立试验中完成的重复次数与试验期间产生的功率之间的关系。75名个体参与了这项研究（n = 30 < 65岁，45 ≥ 65岁）。参与者在配备功率分析仪的情况下进行30秒起立试验。还评估了握力。起立重复次数与起立功率之间的关系为 = 0.32（< 0.001）。当根据（即总和）起立功率对起立重复次数进行回归分析时，将所有参与者的数据合并后得到 = 0.70（< 0.001）。中介分析表明，人体测量学部分介导了起立重复次数与总起立功率之间的关系，占方差的2.8%-6.9%。我们的研究结果表明，在老年人中，起立的总体表现提供了关于每次起立平均功率的有限信息，但更能表明所施加的累积功率。因此，30秒试验中的起立总次数可能是整体肌肉功率更全面的指标，也反映了耐力方面。此外，我们发现个人身体属性，如身高和体重，部分影响起立次数与总功率之间的联系，突出了在肌肉性能评估中考虑个体身体指标的重要性。
