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Locomotive syndrome and the power spectral characteristics of body sway
Author(s) -
Tanaka Satoshi,
Ando Kei,
Kobayashi Kazuyoshi,
Nakashima Hiroaki,
Seki Taisuke,
Ishizuka Shinya,
Machino Masaaki,
Kanbara Shunsuke,
Ito Sadayuki,
Kanemura Tokumi,
Ishiguro Naoki,
Hasegawa Yukiharu,
Imagama Shiro
Publication year - 2020
Publication title -
geriatrics and gerontology international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.823
H-Index - 57
eISSN - 1447-0594
pISSN - 1444-1586
DOI - 10.1111/ggi.13937
Subject(s) - medicine , spectral density , balance (ability) , front (military) , lower body , power (physics) , cold front , physical therapy , statistics , mathematics , physics , quantum mechanics , meteorology
Aim In Japan, nursing care is advised for patients with locomotive syndrome (LS) because of musculoskeletal disorders. Balance tests have indicated an association between LS risk and sway size related to center of pressure (COP) movement. Here, the power spectrum represents the energy contained in each frequency of COP sway. Although balance tests are often performed during health checkups, no studies have investigated the relationship between the power spectrum and LS. This study investigated this relationship. Methods In total, 605 recipients of health checkups were evaluated for LS using the 25‐item Geriatric Locomotive Function Scale. Power spectrums were calculated by applying fast Fourier transform to COP sway time‐series data. These were classified into three sections (0.02–0.2 Hz [low‐frequency band; LFB], 0.2–2 Hz [mid‐frequency band], and 2–10 Hz [high‐frequency band; HFB]). Power spectrums were evaluated in left–right and front–back directions. Results LS was associated with significantly lower ratios for both the HFB ( P = 0.001) in the left–right direction and LFB ( P = 0.007) in the front–back direction. In addition, men had significantly lower HFB ratios in the left–right direction ( P = 0.032) and LFB ratios in the front–back ( P = 0.013), whereas women had significantly lower HFB ratios in the left–right direction ( P = 0.007). Conclusions LS was associated with significantly lower ratios for both the HFB in the left–right direction and LFB in the front–back direction. This understanding of the power spectral characteristics of LS may be useful in the context of pathology and therapeutic intervention. Geriatr Gerontol Int ••; ••: ••–•• Geriatr Gerontol Int 2020; ••: ••–•• .