It is a myositis ("muscle inflammation") produced by physical exertion. I was thinking that it defines itself, and that it should link every word, but the problem is in 'post-effort'; it is understood by post- and effort although it only makes sense in a context like this, since it discriminates from other origins for inflammation such as bacterial, autoimmune, radiation exposure, . . . See myalgia .
* Only one "like" per meaning and day, the more "likes" the meaning will appear higher in the list
