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Background and objective Musculoskeletal disorders (MSDs) are caused by factors such as aging, smoking, high body mass index (BMI), muscle loss, repetition of specific movements, and physical activity of intense muscle demands. MSDs cause pain, decrease the range of motion of joints, reduce proprioception sensory function, and reduce posture maintenance. This study aims to present basic data on prescription of exercise for musculoskeletal movements in elderly people by evaluating the dynamic balance ability according to the presence of MSDs and the body regions affected by MSDs, and verifying the effects of MSD pain on the dynamic balance ability. Material and methods This study examined and identified differences according to the presence MSDs (Disorders, n = 51, age = 67.35 ± 2.62 years; Control, n = 15, age = 66.33 ± 3.10 years) and MSDs of body regions (shoulder, n = 14, age = 66.14 ± 1.95 years; lower back, n = 17, age = 67.82 ± 1.77 years; and knee, n = 20, age = 67.80 ± 2.36 years) in 66 elderly males. The causal relationship between MSD pain and dynamic balance ability was analyzed. The dynamic balance ability was measured using S3-Check (Multi-Functional Training, MFT S3; GmbH, Germany) where the subject takes off his shoes and positions on a 530-mm diameter round platform that moves in the axial direction (left-right or front-back) in the measuring range of +20° to –20° tilt angle. The effect of musculoskeletal disorders in elderly on dynamic balance ability e99 J Mens Health Vol 16(3):e98–e108; 17 September 2020 This article is distributed under the terms of the Creative Commons Attribution-Non Commercial 4.0 International License. ©2020 Kun-Ho Lee and Jinho Park Results The postural stability level was lower in the MSD group than in the group without MSD (left-right, P < 0.001; front-back, P < 0.001). The group with MSDs in the knee and the lower back showed lower results in the left-right and front-back stability index than the group without MSDs. Also, the knee and lower back MSD group showed lower scores in the front-back stability index than the shoulder MSD group. The level of sensory-motor function was lower in the MSD group than in the group without MSD (left-right, P < 0.001; front-back, P < 0.01). The MSD pain showed significantly positive standardized coefficients in the order of sensorimotor index (front-back, β = 0.404, P < 0.01; left-right, β = 0.397, P < 0.01) and stability index (frontback, β = 0.382, P < 0.01; left-right, β = 0.311, P < 0.01). As the degree of MSD pain increased, the postural stability level and sensory-motor function decreased. Conclusions We verified that the MSDs of body regions (knee and lower back) and pain level in the elderly are important factors in the decrease of dynamic balance ability.

The Effect of Musculoskeletal Disorders Body Region and Pain Level in Elderly People on Dynamic Balance Ability