Abstract
The purpose of this study was to assess dynamic joint control (DYJOC) training used as rehabilitation of old knee ligament injuries. Twenty-two students were divided into DYJOC training and isotonic muscle training groups, and each trained for seven weeks. Comparisons were made before and after the training of peak torque value (PTV) and peak torque time (PTT) of the hamstrings and/or quadriceps using KIN.COM and Cybex II, and of gravity center deviation (GCD) . No significant difference was shown on KIN.COM between the two groups. However, the PTT in the DYJOC training group and the PTV in the isotonic muscle training group showed significant improvement on the Cybex II (30RPM), and the GCD was improved significantly in the DYJOC training group. There was no correlation found between isotonic muscle strength and PTT in a total of 164 sessions.
In a separate study, DYJOC training was done, after reconstruction of the anterior cruciate ligament, in 13 cases and Non-DYJOC training, i.e., traditional muscle training, in another 13. A high level of sports' activity after the reconstruction was obtained by seven of eight cases in DYJOC training and by three of six in Non-DYJOC training. It can be said that DYJOC training is very important for old ligament injuries with respect to neuromuscular coordination, thus shortening the time lag of muscular reaction, permitting the smooth performance of motions in sports, and preventing reinjury.
