I am currently testing concentric shoulder abduction and adduction in the Biodex 4 isokinetic dynamometer with two different velocities, 60 deg/sec, and 180 deg/sec. Unexpectedly, the 180 deg/sec peak torque results were higher than 60 deg/sec (the results were obtained from the "Comprehensive Evaluation" of the Biodex 4). However, when raw data were analyzed in the Matlab, we could observe that the 180 deg/sec peak torque was achieved when the movement was slowing down and not at isokinetic velocity (180 deg/sec). The difference of the correct peak torque (at 180 deg/sec) and the one provided by the "Comprehensive Evaluation" is almost double.
Does anyone faced a similar problem in the Biodex 4 or know if there is any filter to minimize this problem?
Hello, Frederiko,
Looking at the red line in your picture seems you are working on biodex simulation mode and this may affect the outcome of comprehensive evaluation results. If I'm right remove the tick in setup section.
Best regards, Henrikas
Hi,
If you look more cerfuly at purpe line you will see that your torgue is unnormuosly high-peaking at the end of movement... This is becouse of recoil at the end of movement and this could be seen in all fast isokinetic movements using biodex... So, you must delete that part from analysis.
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