Kim Dong Hyun, Oh Sohee, Kim Seungcheol, Lee Sang Yoon
Department of Radiology, Seoul National University College of Medicine, SMG-SNU Boramae Medical Center, Dongjak-gu, Seoul, Republic of Korea.
Medical Research Collaborating Center, SMG-SNU Boramae Medical Center, Dongjak-gu, Seoul, Republic of Korea.
J Aging Phys Act. 2024 Aug 7;33(1):10-16. doi: 10.1123/japa.2023-0328. Print 2025 Feb 1.
The lumbar extensor muscles (LEMs) play an important role in body posture and physical function in older adults. Because lumbar extensor strength decreases more rapidly than limb muscle strength with age, it should be evaluated to aid healthy aging. This study investigated the association between LEM strength and physical performance in community-dwelling older adults.
This prospective observational cohort study of spinal sarcopenia (SarcoSpine) was conducted at a single center. One hundred and ten consecutive individuals who completed the baseline survey, including conventional sarcopenic indices, lumbar spine three-dimensional magnetic resonance imaging, isokinetic lumbar extensor strength, and physical performance tests (Short Physical Performance Battery, Berg Balance Scale, and Back Performance Scale [BPS]), were enrolled. A multivariate linear regression analysis was performed to determine the variables for evaluating their association with LEM strength.
Among the conventional sarcopenic indices, gait speed was significantly correlated with Short Physical Performance Battery results and Berg Balance Scale score in men and women. Handgrip strength was significantly correlated with the BPS score for both sexes. In the multivariable linear regression, age (β = -2.12, p < .01) and BPS score (β = -3.54, p = .01, R2 = .29) were independent indicators of LEM strength.
Our findings reveal the substantial association between LEM strength and BPS score in older women. The targeted intervention aimed at improving the LEMs strength would be needed to enhance physical performance in the aging population.
腰伸肌（LEMs）在老年人的身体姿势和身体功能中起着重要作用。由于随着年龄增长，腰伸肌力量比肢体肌肉力量下降得更快，因此应对其进行评估以促进健康老龄化。本研究调查了社区居住的老年人腰伸肌力量与身体表现之间的关联。
本前瞻性观察性队列研究（脊柱肌肉减少症研究[SarcoSpine]）在单一中心进行。连续纳入110名完成基线调查的个体，调查内容包括传统的肌肉减少症指标、腰椎三维磁共振成像、等速腰伸肌力量以及身体表现测试（简短身体表现量表、伯格平衡量表和背部表现量表[BPS]）。进行多变量线性回归分析以确定评估其与腰伸肌力量关联的变量。
在传统的肌肉减少症指标中，步态速度与男性和女性的简短身体表现量表结果及伯格平衡量表得分显著相关。握力与男女两性的BPS得分均显著相关。在多变量线性回归中，年龄（β = -2.12，p <.01）和BPS得分（β = -3.54，p =.01，R2 =.29）是腰伸肌力量的独立指标。
我们的研究结果揭示了老年女性腰伸肌力量与BPS得分之间的显著关联。需要针对提高腰伸肌力量进行有针对性的干预，以增强老年人群的身体表现。
