You didn't mention why the hysterectomy was done.
If she is stiff and "locked up" after high intensity (high cortisol and adrenaline dumps) exercise, with her history of competitive athletics, she may be suffering from adrenal fatigue--this will only be worsened after the stress of surgery.
She should take the Adrenal Fatigue questionnaire
to gauge the severity of this issue, to see if it is something worth addressing. A 4x Cortisol saliva test may be of value as well.