This is easy - fake a lower back injury. Tons of people do it. In fact, my brother used to work for the AG - and they would stake out people who they suspected of cheating like that. Just don’t openly go play softball and mow your lawn.
The summer between junior and senior year in high school one of my buddies that had just graduated had committed to the Navy. Late summer he started to get cold feet… Being a bunch of fucked up kids we didn’t know what to do about it but one night at a party he got fucked up and decided we had to break his leg to get him out of it. So he propped his leg on a folding chair and another guy stomped on his knee. It was fucking gnarly. It worked though, got him out of the Navy lol.