I know a lot of groomers who have enjoyable lives and great backs and STILL ride pretty much ever day. Even my buddy who is the bitch of the graveyard shift rides everyday he wants.
And whens the last time you were in a cat built more recently than the 1970s, because every single cat I've been in is pretty damn comfy.
But yes, you will be grooming trails in circles the whole time. You gotta start there though.
As mentioned before, being good with other heavy machinery is one of the most important things.