2011, Volume 7, Issue 3
An innovative approach for real time determination of power and reaction time in a martial arts quasitraining environment using 3D motion capture and EMG measurements
Shao-Tsung Chang1, Sarah Crowe1, Xiang Zhang2, Jared Evans3, Gongbing Shan3
1Department of Kinesiology, University of Lethbridge, Lethbridge, Alberta, Canada, Department of Math & Computer Science, University of Lethbridge, Lethbridge, Alberta, Canada
2Department of Kinesiology, University of Lethbridge, Lethbridge, Alberta, Canada, Department of P.E., Xinzhou Teachers University, Xinzhou, China
3Department of Kinesiology, University of Lethbridge, Lethbridge, Alberta, Canada
Author for correspondence: Gongbing Shan; Department of Kinesiology, University of Lethbridge, Lethbridge, Alberta, Canada; email: g.shan[at]uleth.ca
Background and Study Aim: Power and neural response are two fundamental elements in many martial arts striking. Currently, there are no practical methods exist to present these aspects to coaches and athletes in a training environment. This study introduced a new method for quantifying the two factors that could be used in real-time biofeedback training.
Material and Methods: The new method consisted of self-developed optical signal system, EMG measurement and 3D motion capture. The quantification was done by using kinematics of the punching bag and striking limbs analyzed with self-developed dynamic calculation programs. The setup was very close to a training environment with neglect-able influence on an athlete performance.
Results: The results showed that such quantification provided both total power and power components (i.e. linear & angular) of striking as well as the related response processes/time.
Conclusions: Since the method could offer feedback of power intensity, attack accuracy, central and peripheral reaction time to coachers and athletes, it would have great potential to become a biofeedback tool in practice for increasing training efficiency and effectiveness.
Key words: attack accuracy , central and peripheral reaction time, linear and angular power, quantification, real-time feedback