Excessively strain (oneself) (9)
I believe the answer is:
overexert
(Other definitions for overexert that I've seen before include "strain" , "work too hard" , "Make too much effort" , "exercise unduly?" , "use too much" .)
I believe the answer is:
overexert
(Other definitions for overexert that I've seen before include "strain" , "work too hard" , "Make too much effort" , "exercise unduly?" , "use too much" .)