Department of Geriatrics, Orthopedics and Rheumatology, Center for Geriatric Medicine (Ce.M.I.), Università Cattolica del Sacro Cuore, Largo Francesco Vito 1, 00168, Rome, Italy.
Department of Health, Piaget University, Av. Mogi das Cruzes 1001, 08673-010, Suzano - SP, Brazil.
Sci Rep. 2023 Aug 14;13(1):13186. doi: 10.1038/s41598-023-39182-7.
The present study was conducted to provide normative values for lower-limb muscle power estimated through equations based on the 5 times sit-to-stand (5STS) test in Brazilian older women. In addition, we investigated the association between muscle power parameters and age. The study followed a cross-sectional design. Participants were community-dwelling women. Candidates were considered eligible if they were 18 years or older, lived independently, and possessed sufficient physical and cognitive abilities to perform all measurements required by the protocol. The 5STS test was performed as fast as possible using a standard protocol. Absolute, relative, and allometric muscle power measures were estimated using 5STS-based equations. Two thousand four-hundred seventy-one women participated in the present study. Results indicated that muscle power-related parameters decreased linearly with age. Women 60-69 years showed a marginal reduction in absolute (- 5.2%), relative (- 7.9%), and allometric (- 4.0%) muscle power. A larger reduction was observed in those 70-79 years and reached ¼ of loss in participants ≥ 80, in comparison to middle-aged participants. Pearson's correlation and linear regression analyses indicated that power-related parameters were negatively associated with age. In conclusion, data of the present study provide normative values for lower-limb muscle power parameters according to 5STS-based equations. We observed that muscle power-related parameters declined with age, such that participants 60-69, 70-79, and ≥ 80 years displayed lower absolute and relative muscle power compared middle-aged women. A later decline was observed in allometric muscle power. Relative muscle power declined to a greater extent than other parameters, suggesting a possible window of opportunity for interventions.
本研究旨在为巴西老年女性基于 5 次坐站（5STS）测试的方程估算的下肢肌肉力量提供正常值。此外，我们还研究了肌肉力量参数与年龄之间的关系。该研究采用了横断面设计。参与者为社区居住的女性。如果候选人年龄在 18 岁或以上，独立生活，并且拥有足够的身体和认知能力来完成协议要求的所有测量，则被认为符合条件。5STS 测试按照标准方案尽可能快地进行。使用基于 5STS 的方程估算绝对、相对和比例肌肉力量指标。本研究共纳入了 2471 名女性。结果表明，肌肉力量相关参数随年龄呈线性下降。60-69 岁的女性在绝对（-5.2%）、相对（-7.9%）和比例（-4.0%）肌肉力量方面表现出轻微下降。70-79 岁的女性下降幅度更大，与中年参与者相比，≥80 岁的参与者损失了 1/4 的肌肉力量。Pearson 相关和线性回归分析表明，肌肉力量相关参数与年龄呈负相关。总之，本研究的数据为基于 5STS 的方程提供了下肢肌肉力量参数的正常值。我们观察到肌肉力量相关参数随年龄下降，60-69 岁、70-79 岁和≥80 岁的参与者的绝对和相对肌肉力量均低于中年女性。比例肌肉力量的下降更为明显。相对肌肉力量的下降幅度大于其他参数，这表明可能存在干预的机会窗口。
