Abstract des Autors

The stability of the ankle joint is closely related to the integrity of the ligament apparatus and to a good control capacity of the muscles working it. In order to prevent injuries during sport practice, it is important to have a sound tono-trophy of these muscles. The muscles of the fibula are particularly useful for this purpose as they act as lateral stabilizers. The isokinetic mode can be used as a valied support in the programmes of rehabilitation and strengthening of the ankle. The purpose of this study was to evaluate strength in the single muscle groups acting on the tibia-tarsus and under-astragalus joints in a sample of young athletes, in order to obtain standard reference parameters for rehabilitation protocols. The subjects were 60 physical education students (ISEF), male and female, aged 19 to 26, practicing sport activity at a non-elite level. The following movements were used: dorsi-plantar flexion and inversion-eversion. The following angular velocities were used: 60 deg/sec and 150 deg/sec. The results show that the extensor muscles are three times stronger than flexors, while the muscles acting on the eversion movement can apply strength in a two-third ratio with the inversion movement. If we consider strength as related to the subject weight, the differences are always significant between the two sexes, except for plantar flexion. We found that all female subjects performing the movements showed a greater mobility range. The maximum peak-torque values were reached during plantar flexion followed by inversion, dorsal flexion and eversion. The evaluation of a sample of young athletes allowed us to set useful parameters in rehabilitation, considering the influence of training on muscle capacity. Verf.-Referat