“Sthiram sukham aasanam “(स्थिरम् सुखम् आसनम”) This is the definition of aasanas or the exercise - positions of the body in which position one can comfortably be sthir or stable for sometime …. This should NOT , I repeat NOT be rigorous at any moment of the exercise / asan So, answer to your question is that no strenuous and exhaustive kind of exercise is advisable in even normal people at any stage of life which will produce muscle pain and stiffness later on . Rather in your case you can do abdominal asanas of the kind of pawanmuktaasana kind of asanas related to the abdomen which apart from not being strenuous and injurious to the inguinal area are effective in the flow of praana or the life energy through the tissues in and around the inguinal and surrounding regions.

Start with Russian curls