engleski

New experimental procedures for kinematic analysis and muscle activity identification in case of ergometer rowing

This article represents new experimental approaches to the problems of kinematics analysis and muscle activity identifications applied in case of ergometer rowing. Moreover, it is also proposed principle of defining muscle activity participation in generating body segment motion. First experiment was done on sample of 20 rowers and it is included indoor rowing kinematics recording and data acquisition by using the video motion tracking system. Video camera – PC system records positions of markers attached on eight crucial points, in sagital plane. With a human body link segment model, the associated lines and the angular parameters of particular segments were calculated from the markers positions. Comparison of kinematics parameters of a representative sample (an elite rower) with kinematics parameters of others rowers is used for the rowing technique correction. Second experimental procedure included simultaneous measurement of EMG activity of Vastus Medialis, Biceps and Gastrocnemius muscles and kinematics data acquisition by using same video motion tracking system. Processing of collected kinematics and EMG data were done in Matlab program package. Thus, intervals of muscle activity can be defined in particular stroke phase by using threshold method, and beside that muscle participation in generating body segment movement correlating envelope of rectified and wavelets denoised emg signal with particular angular acceleration.

rowing; biomechanics; EMG; computer vision; signal processing

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