ERMI is the abbreviation of End Range Motion Improvement, using a rehabilitation device to improve range of motion of the joint.
Why is 'end range of motion' important?
In the knee one can get away with a lack of quite a few degrees of flexion, but extension (straightening) is much more important to acheive. The lack of only 5 degrees or so of extension means that one cannot lock the leg back while standing, and this causes stress on the whole frame.
Synonyms:
End range of motion improvement
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