Characterization of ankle dorsiflexors performance in healthy subjects following maximal-intensity isokinetic resistance training.

Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology

PubMedID: 26116241

Manca A, Solinas G, Dragone D, Dvir Z, Deriu F. Characterization of ankle dorsiflexors performance in healthy subjects following maximal-intensity isokinetic resistance training. J Electromyogr Kinesiol. 2015;.
The purpose of this randomized trial was to examine, in healthy subjects, the effect of unilateral isokinetic-concentric training of the dominant ankle dorsiflexors (DF) on the peak moment (PM), mean PM (MPM), maximal work and mean work (meanW). Thirty volunteers (26. 7±4. 6years old) underwent bilateral isokinetic testing of ankle DF at 45 and 90°/s. PARTICIPANTS
were randomly assigned to a control or a training group.The training lasted 4weeks (4-day/week). All dynamometric parameters increased significantly only in the training group for the trained leg (p<0. 05), with greater gains in work (32-47% at 45°/s and 31-41% at 90°/s) than moment variables (14-18% at 45°/s and 14-28% at 90°/s). Similar increases in strength were also noted at both angular velocities in the untrained leg (p<0. 01) for both work and moment parameters, depicting a cross-training effect. Correlations between 'moments' and 'works' increased in both legs after training from 0. 59-0. 77 to 0. 79-0. 95. Principal component analysis indicated that, at baseline, PM showed the highest weight on DF performance; after training, meanW at 90°/s and MPM at 45°/s exhibited the highest loadings. High-intensity training of ankle DF increase the ability in generating energy throughout the entire range of motion rather than maximizing the PM.