Relationship of back muscle and knee extensors with the compensatory mechanism of sagittal alignment in a community-dwelling elderly population

Abstract Compensatory mechanisms, such as a decrease in thoracic spine kyphosis and posterior tilting or rotation of the pelvis, aim to achieve optimal alignment of the spine. However, the effect of muscle strength on these compensatory mechanisms has not been elucidated. This study aimed to investi...

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Autores principales:	Shinji Takahashi, Masatoshi Hoshino, Shoichiro Ohyama, Yusuke Hori, Akito Yabu, Akio Kobayashi, Tadao Tsujio, Shiro Kotake, Hiroaki Nakamura
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/013d596a426e42e0bbcd95c0409f1220
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spelling	oai:doaj.org-article:013d596a426e42e0bbcd95c0409f12202021-12-02T10:47:54ZRelationship of back muscle and knee extensors with the compensatory mechanism of sagittal alignment in a community-dwelling elderly population10.1038/s41598-021-82015-82045-2322https://doaj.org/article/013d596a426e42e0bbcd95c0409f12202021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-82015-8https://doaj.org/toc/2045-2322Abstract Compensatory mechanisms, such as a decrease in thoracic spine kyphosis and posterior tilting or rotation of the pelvis, aim to achieve optimal alignment of the spine. However, the effect of muscle strength on these compensatory mechanisms has not been elucidated. This study aimed to investigate the impact of back muscle and lower extremity strength on compensatory mechanisms in elderly people. Overall, 409 community-dwelling elderly participants (164 men, 245 women) were included. Age, disc degeneration, and 2 or more vertebral fractures showed a significant increase of risk for sagittal vertical axis (SVA) deterioration. Conversely, stronger back, hip flexor, and knee extensor muscles reduced the risk for SVA deterioration. To investigate the association of each muscle’s strength with compensatory mechanisms, 162 subjects with pelvic incidence-lumbar lordosis > 10° were selected. The linear regression model for thoracic kyphosis demonstrated a negative correlation with back muscle strength and positive correlation with vertebral fracture. The regression analysis for pelvic tilt demonstrated a positive correlation with knee extensor strength. Back, hip flexor, and knee extensor muscle strength were associated with sagittal spinal alignment. Back muscle strength was important for the decrease in thoracic kyphosis, and knee extensor strength was associated with pelvic tilt.Shinji TakahashiMasatoshi HoshinoShoichiro OhyamaYusuke HoriAkito YabuAkio KobayashiTadao TsujioShiro KotakeHiroaki NakamuraNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Shinji Takahashi Masatoshi Hoshino Shoichiro Ohyama Yusuke Hori Akito Yabu Akio Kobayashi Tadao Tsujio Shiro Kotake Hiroaki Nakamura Relationship of back muscle and knee extensors with the compensatory mechanism of sagittal alignment in a community-dwelling elderly population
description	Abstract Compensatory mechanisms, such as a decrease in thoracic spine kyphosis and posterior tilting or rotation of the pelvis, aim to achieve optimal alignment of the spine. However, the effect of muscle strength on these compensatory mechanisms has not been elucidated. This study aimed to investigate the impact of back muscle and lower extremity strength on compensatory mechanisms in elderly people. Overall, 409 community-dwelling elderly participants (164 men, 245 women) were included. Age, disc degeneration, and 2 or more vertebral fractures showed a significant increase of risk for sagittal vertical axis (SVA) deterioration. Conversely, stronger back, hip flexor, and knee extensor muscles reduced the risk for SVA deterioration. To investigate the association of each muscle’s strength with compensatory mechanisms, 162 subjects with pelvic incidence-lumbar lordosis > 10° were selected. The linear regression model for thoracic kyphosis demonstrated a negative correlation with back muscle strength and positive correlation with vertebral fracture. The regression analysis for pelvic tilt demonstrated a positive correlation with knee extensor strength. Back, hip flexor, and knee extensor muscle strength were associated with sagittal spinal alignment. Back muscle strength was important for the decrease in thoracic kyphosis, and knee extensor strength was associated with pelvic tilt.
format	article
author	Shinji Takahashi Masatoshi Hoshino Shoichiro Ohyama Yusuke Hori Akito Yabu Akio Kobayashi Tadao Tsujio Shiro Kotake Hiroaki Nakamura
author_facet	Shinji Takahashi Masatoshi Hoshino Shoichiro Ohyama Yusuke Hori Akito Yabu Akio Kobayashi Tadao Tsujio Shiro Kotake Hiroaki Nakamura
author_sort	Shinji Takahashi
title	Relationship of back muscle and knee extensors with the compensatory mechanism of sagittal alignment in a community-dwelling elderly population
title_short	Relationship of back muscle and knee extensors with the compensatory mechanism of sagittal alignment in a community-dwelling elderly population
title_full	Relationship of back muscle and knee extensors with the compensatory mechanism of sagittal alignment in a community-dwelling elderly population
title_fullStr	Relationship of back muscle and knee extensors with the compensatory mechanism of sagittal alignment in a community-dwelling elderly population
title_full_unstemmed	Relationship of back muscle and knee extensors with the compensatory mechanism of sagittal alignment in a community-dwelling elderly population
title_sort	relationship of back muscle and knee extensors with the compensatory mechanism of sagittal alignment in a community-dwelling elderly population
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/013d596a426e42e0bbcd95c0409f1220
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Relationship of back muscle and knee extensors with the compensatory mechanism of sagittal alignment in a community-dwelling elderly population

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