BODY FIXED ANKLE DYNAMOMETER FOR ISOMETRIC TESTS IN-SPACE FLIGHTS

To study neuromuscular variables in isometric contraction, a body-fixe d ankle dynamometer with integrated electromyographic (EMG) system and software-controlled load tests was developed. It consists of a footpl ate acting against a load cell in plantar flexion. Counteraction is su pported by a perpendicular telescopic stand which runs from the heel t o the thigh with the knee flexed at an angle of 90 degrees. Additional to contraction force, force tremor and surface EMG from the triceps s urae and tibialis anterior muscles are recorded. The software consists of three load tests to assess variables of muscle fatigue, motor perf ormance and motor memory. The dynamometer was optimised in relation to functionality and selection of construction materials for the use on the Russian MIR space station.