Isokinetic Concentric and Eccentric Evaluation of the Ankle Flexors and Extensors

• Published in: Isokinetics and exercise science 2000-01, Vol.8 (1), p.36-36
• Main Authors: Claes, M, Longue, V, Leclercq, R, Gregoir, C
• Format: Article
• Language: English
• ISSN: 0959-3020

The aim of this study was to provide descriptive eccentric and concentric strength of ankle's flexors and extensors, comparing dominant and non-dominant side. 20 young healthy non-athletic adults (10 women and 10 men), mean aged 22.5 years old were tested on a CYBEX 6000 dynamometer. The position was prone with 0 degree -knee extension. The range of motion was -20 degree of dorsiflexion (DF) to 50 degree of plantar flexion (PF). Speeds were 30, 120, 150 degree . S-1 for concentric mode and 30, 60, 90 degree . S-1 for eccentric mode. In women, PF's peak torque was from 46 Nm to 78 Nm on concentric mode, and from 79 Nm to 91 Nm on eccentric mode. DF's peak torque was respectively from 9.1 Nm to 15 Nm and 23 Nm to 27 Nm. In men, PF's peak torque was from 62 Nm to 107 Nm on concentric mode and from 112 Nm to 129 Nm on eccentric mode. DF's peak torque was respectively from 8.2 Nm to 21 Nm and 35 Nm to 38 Nm. No difference was observed in peak torque between dominant and non-dominant side. DF/PF ratio was mean 0.15 on concentric mode and 0.3 on eccentric mode. The ratio is not modified by neither speed, gender or side tested. Peak torque was correlated with body weight only for the plantar flexion in both genders. Plantar flexors are stronger than dorsiflexors. No difference is found between dominant and non-dominant leg.