naa a22 4500 510822959 CHVBK 20180411083542.0 cr unu---uuuuu 180411e20131201xx s 000 0 eng 10.1007/s12541-013-0296-3 doi (NATIONALLICENCE)springer-10.1007/s12541-013-0296-3 Study of muscle strength imbalance at the shoulder joint between the young and the old [Elektronische Daten] [Jae-Soo Hong, Keyoung-Jin Chun, Jong-Hyun Kim, Byung Park, Jung-Hwa Hong] This study examined muscle imbalance in the cases of isokinetic movement of the shoulder joint, targeting the young and the old. The experiment was divided into the dominant and non-dominant sides and consisted of flexion, extension, abduction, adduction, external rotation, and internal rotation. Regarding the angular velocity, the peak torque was measured for the equal condition of 30, 60, and 120 deg/s. The concentric and eccentric muscular strengths were measured based on each motion. This study showed that concentric movement tended to decrease the peak torque on the dominant and non-dominant sides alike by increasing the angular velocity, whereas an eccentric movement had a tendency to boost the peak torque by increasing the velocity except for the dominant external rotation. In the case of the young, most of the motion showed that the dominant side had a higher peak torque than the non-dominant side regardless of the angular velocity. The results from the elderly were different from the young, and the non-dominant side tended to have a higher peak torque than the dominant one regardless of the angular velocity. According to the Antagonistic Strength relationships(Concentric) in the young and the old, young people's flexion/ extension ratio was 3 ∼ 13%, abduction/adduction 1 ∼ 16%, and external rotation/internal rotation 5 ∼ 10%. The data from the elderly showed that the ratio of abduction/adduction under concentric contraction ranged from 20 to 31%, which was higher than that reported previously. The elderly showed an imbalanced muscle tendency. This result is expected to provide a useful basic guideline for measuring the shoulder function of the young and old, and consisted rehabilitation equipment and its programs. Korean Society for Precision Engineering and Springer-Verlag Berlin Heidelberg, 2013 Shoulder nationallicence Isokinetic nationallicence Muscle strength nationallicence Rehabilitation nationallicence Concentric nationallicence Eccentric nationallicence Hong Jae-Soo Gerontechnology center, KITECH, 35-3 Hongcheon-Ri, Ipjang-Myeon, 330-825(330-825), Cheonan-Si, Chungcheongnam-Do, South Korea aut Chun Keyoung-Jin Gerontechnology center, KITECH, 35-3 Hongcheon-Ri, Ipjang-Myeon, 330-825(330-825), Cheonan-Si, Chungcheongnam-Do, South Korea aut Kim Jong-Hyun Gerontechnology center, KITECH, 35-3 Hongcheon-Ri, Ipjang-Myeon, 330-825(330-825), Cheonan-Si, Chungcheongnam-Do, South Korea aut Park Byung Physical Medicine and Rehabilitation, Korea University Ansan Hospital, Gojan 1-Dong, Danwon-Gu, 152-703(152-703), Ansan-Si, Gyeonggi-Do, South Korea aut Hong Jung-Hwa Department of Control & Instrumentation, Korea University, Jochiwon-Euop, 339-700(339-700), Yeongi-Gun,Chungcheongnam-Do, South Korea aut International Journal of Precision Engineering and Manufacturing Springer Berlin Heidelberg 14/12(2013-12-01), 2187-2192 2234-7593 14:12<2187 2013 14 12541 https://doi.org/10.1007/s12541-013-0296-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12541-013-0296-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hong Jae-Soo Gerontechnology center, KITECH, 35-3 Hongcheon-Ri, Ipjang-Myeon, 330-825(330-825), Cheonan-Si, Chungcheongnam-Do, South Korea aut NATIONALLICENCE 700 1- Chun Keyoung-Jin Gerontechnology center, KITECH, 35-3 Hongcheon-Ri, Ipjang-Myeon, 330-825(330-825), Cheonan-Si, Chungcheongnam-Do, South Korea aut NATIONALLICENCE 700 1- Kim Jong-Hyun Gerontechnology center, KITECH, 35-3 Hongcheon-Ri, Ipjang-Myeon, 330-825(330-825), Cheonan-Si, Chungcheongnam-Do, South Korea aut NATIONALLICENCE 700 1- Park Byung Physical Medicine and Rehabilitation, Korea University Ansan Hospital, Gojan 1-Dong, Danwon-Gu, 152-703(152-703), Ansan-Si, Gyeonggi-Do, South Korea aut NATIONALLICENCE 700 1- Hong Jung-Hwa Department of Control & Instrumentation, Korea University, Jochiwon-Euop, 339-700(339-700), Yeongi-Gun,Chungcheongnam-Do, South Korea aut NATIONALLICENCE 773 0- International Journal of Precision Engineering and Manufacturing Springer Berlin Heidelberg 14/12(2013-12-01), 2187-2192 2234-7593 14:12<2187 2013 14 12541 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer