I had a total hysterectomy in july of 2012 and developed a sizable hernia recently. i want to continue with fitness classes but have concerns.

Need to be fixed : If you want to be active plan elective repair of incisional hernia , uses a abdominal binder as a temporary measure during activity to prevent incarciration , get is fixed , once healed you can do every thing you did before

Depends: What type of hernia is it? Inguinal, femoral, incisional? It makes a difference. You need to see your doctor to find out and get the right advise.