title: Characteristic analysis of the lower limb muscular strength training system applied with MR dampers.
abstract: A new training system that can adjust training intensity and indicate the center pressure of a subject was proposed by applying controlled electric current to the Magneto-Rheological damper. The experimental studying on the muscular activities were performed in lower extremities during maintaining and moving exercises, which were processed on an unstable platform with Magneto rheological dampers and recorded in a monitor. The electromyography (EMG) signals of the eight muscles in lower extremities were recorded and analyzed in certain time and frequency domain. Muscles researched in this paper were rectus femoris (RF), biceps femoris (BF), tensor fasciae latae (TFL), vastuslateralis (VL), vastusmedialis (VM), gastrocnemius (Ga), tibialis anterior (TA), and soleus (So). Differences of muscular activities during four moving exercises were studied in our experimental results. The rate of the increment of the muscular activities was affected by the condition of the unstable platform with MR dampers, which suggested the difference of moving exercises could selectively train each muscle with varying intensities. Furthermore, these findings also proposed that this training system can improve the ability of postural balance.
authors.affiliation: Division of Biomedical Engineering, Chonbuk National University, Deokjin-Dong 1-Ga, Jeonju, Jeonbuk 561-756, South Korea.
authors.forename: Chang Ho
authors.initials: CH
authors.lastname: Yu
authors.forename: Young Jun
authors.initials: YJ
authors.lastname: Piao
authors.forename: Kyung
authors.initials: K
authors.lastname: Kim
authors.forename: Tae Kyu
authors.initials: TK
authors.lastname: Kwon
mesh_terms: D000328:Adult; D001696:Biomechanical Phenomena; D004576:Electromyography; D004594:Electrophysiology; D004867:Equipment Design; D005260:Female; D006801:Humans; D007866:Leg / Q000473:pathology*; D008280:Magnetics; D008297:Male; D018482:Muscle, Skeletal / Q000473:pathology*; D004856:Postural Balance; D015203:Reproducibility of Results; D055070:Resistance Training; D012212:Rheology / Q000379:methods*; D012984:Software; D013997:Time Factors
keywords: Muscular activities; magneto-rheological damper; unstable platform