A technique for measurements of plantar flexion torque with the Cybex II dynamometer

A standard procedure for measurements of calf muscle strength with an isokinetic dynamometer is presented. The method is based on recordings in supine position, with a straight knee joint and a firm fixation of the foot in a new device. The reproducibility was studied by a test-retest procedure in ten testing subjects. The methodological error varied between 5 and 10% and the coefficient of reliability varied between 0.94 and 0.98. The coefficient of variation when measuring one testing subject at ten different occasions was smaller at isokinetic than at isometric measurements.