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Proceedings Paper

Effects of the lower extremities muscle activation during muscular strength training on an unstable platform with magneto-rheological dampers
Author(s): YongJun Piao; YounJung Choi; JungJa Kim; TaeKyu Kwan; Nam-Gyun Kim
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Paper Abstract

Adequate postural balance depends on the spatial and temporal integration of vestibular, visual, and somatosensory information. Especially, the musculoskeletal function (range of joint, flexibility of spine, muscular strength) is essential in maintaining the postural balance. Muscular strength training methods include the use of commercialized devices and repeatable resistance training tools (rubber band, ball, etc). These training systems cost high price and can't control of intensity. Thus we suggest a new training system which can adjust training intensity and indicate the center of pressure of a subject while the training was passively controlled by applying controlled electric current to the Magneto- Rheological damper. And we performed experimental studies on the muscular activities in the lower extremities during maintaining, moving and pushing exercises on an unstable platform with Magneto rheological dampers. A subject executed the maintaining, moving and pushing exercises which were displayed in a monitor. The electromyographic signals of the eight muscles in lower extremities were recorded and analyzed in the time and frequency domain: the muscles of interest were rectus femoris, biceps femoris, tensor fasciae latae, vastus lateralis, vastus medialis, gastrocnemius, tibialis anterior, and soleus. The experimental results showed the difference of muscular activities at the four moving exercises and the nine maintaining exercises. The rate of the increase in the muscular activities was affected by the condition of the unstable platform with MR dampers for the maintaining and moving exercises. The experimental results suggested the choice of different maintaining and moving exercises could selectively train different muscles with varying intensity. Furthermore, the findings also suggested the training using this system can improve the ability of postural balance.

Paper Details

Date Published: 31 March 2009
PDF: 10 pages
Proc. SPIE 7290, Industrial and Commercial Applications of Smart Structures Technologies 2009, 72900T (31 March 2009); doi: 10.1117/12.815916
Show Author Affiliations
YongJun Piao, Chonbuk National Univ. (Korea, Republic of)
YounJung Choi, Chonbuk National Univ. (Korea, Republic of)
JungJa Kim, Chonbuk National Univ. (Korea, Republic of)
TaeKyu Kwan, Chonbuk National Univ. (Korea, Republic of)
Nam-Gyun Kim, Chonbuk National Univ. (Korea, Republic of)


Published in SPIE Proceedings Vol. 7290:
Industrial and Commercial Applications of Smart Structures Technologies 2009
Benjamin K. Henderson; M. Brett McMickell, Editor(s)

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