Sex differences between the relationship of trunk muscle mass and whole body sagittal plane alignment in older adults

• Published in: Journal of orthopaedic science : official journal of the Japanese Orthopaedic Association 2023-03, Vol.28 (2), p.315-320
• Main Authors: Ide, Koichiro, Yamato, Yu, Hasegawa, Tomohiko, Yoshida, Go, Banno, Tomohiro, Arima, Hideyuki, Oe, Shin, Mihara, Yuki, Ushirozako, Hiroki, Yamada, Tomohiro, Watanabe, Yuh, Nakai, Keiichi, Kurosu, Kenta, Hoshino, Hironobu, Matsuyama, Yukihiro
• Format: Article
• Language: English
• Subjects: Aged; Aged, 80 and over; Female; Humans; Kyphosis - diagnostic imaging; Lordosis - diagnostic imaging; Lower Extremity - diagnostic imaging; Male; Muscles; Radiography; Sex Characteristics
• ISSN: 0949-2658; 1436-2023
• DOI: 10.1016/j.jos.2021.11.014

This study aimed to clarify sex differences in the relationship between trunk muscle mass, aging, and whole-body sagittal alignment. Subjects aged 60–89 years who underwent musculoskeletal screening in 2018 were included in the study. Subject demographics, trunk muscle mass (TMM) measured by bioelectrical impedance analysis (BIA), and spinopelvic and lower extremity alignment parameters measured from standing radiographic images were investigated. Additionally, TMM was corrected for BMI (TMM/BMI). The relationship between trunk muscle and whole-body sagittal alignment was analyzed for each age group (young-old group (60–74 years) and old–old group (>75 years)) and sex. A total of 281 (mean age 75.4 ± 6.7 years, 100 males and 181 females) were enrolled. The trunk muscle mass in both men and women significantly decreased with age. Regarding TMM/BMI, there was no significant difference in men, but there was a significant difference between females in the young-old and old–old groups (p