Open AccessANALYSIS OF MUSCLE STRENGTH EFFECTS ON EXERCISE PERFORMANCE USING DYNAMIC STABILIZATION EXERCISE DEVICE
Author(s) -
Kap-Soo Han,
Seung-Rok Kang,
Tae−Kyu Kwon
Publication year - 2020
Publication title -
journal of mechanics in medicine and biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.236
H-Index - 30
eISSN - 1793-6810
pISSN - 0219-5194
DOI - 10.1142/s0219519420400047
Subject(s) - physical medicine and rehabilitation , muscle strength , inverse dynamics , electromyography , tilt (camera) , rehabilitation , physical therapy , back muscles , skeletal muscle , medicine , mathematics , anatomy , physics , geometry , kinematics , classical mechanics
Muscle strength may vary depending on the pathological issues and static life habits. These conditions lead to abnormal spinal loads and change muscle strength as well as activation patterns, thereby causing spinal disorders. In this study, the effects of muscle strength on the spine stabilization exercise were analyzed using a whole-body tilt device. Musculoskeletal modeling was performed and the results were validated through a comparison with the electromyography (EMG) analysis results. Based on the validated basic model, modeling was performed for the whole-body tilt device. To examine the exercise effect and muscle activation while the maximum muscle force capacity (MFC) was varied from 30[Formula: see text]N/cm 2 to 60[Formula: see text]N/cm 2 and 90[Formula: see text]N/cm 2 , the muscle force was predicted through inverse dynamics analysis. When MFC was 30[Formula: see text]N/cm 2 , the posterior direction of the tilt could not be analyzed (no solution found). When MFC was 60[Formula: see text]N/cm 2 , it could be analyzed, but the muscle force was predicted to be higher compared to when MFC was 90[Formula: see text]N/cm 2 . It was confirmed that muscle strength is a very important element for maintaining postural activities and performing exercise. Therefore, for rehabilitation patients and elderly people with weak muscle strength, hard or extreme exercise may cause musculoskeletal injuries.