I had surgery on my left ankle in October to fix a bad achilles tendon. It wasn't that bad, but I couldn't even the lightest pressure on it, so I was pretty immobile for three or four weeks.
I managed to clean most of my handguns, and loaded a couple of thousand rounds of various calibers.
Near the end of my recovery, my club opened a new range for competition practice (only range where you can move while shooting). They came up with a form that had to be signed by various club officers, and a competency "test".
I was feeling kind of good, and didn't want to miss out on the last test before winter, so I signed up for it. I was feeling so good that I didn't even bother to wear the big black protective boot my doctor gave me. I didn't know it was going to be a timed test!
They explained the course to us, and I figured that I'd just go slow, take small steps and I'd come close to the time limit. Well, the buzzer goes off and old habits kicked in and I took one big fast step, and hit the ground in pain. It felt like someone hit me with a baseball bat. All I wanted to do was lie there in pain, but everyone kept trying to stand me back up.
After a few seconds (which felt like an hour) I got back up, reloaded and tried it again. Following my original plan, I was a tad slow, but with a wink and nod, the instructor passed me. He even complimented me on my good muzzle control even while falling to the ground.
Leaving the range was another problem. After I cooled off, the ankle stiffen and was really really sore. Sore enough that I called my wife to bring the protective boot to me, even though I knew what she'd say, and how long she'd be saying it. I had a checkup a couple of weeks later, and though the pain was gone, I figured I better tell my doctor what I did, in case I did any damage. He examined me, asked abunch of questions and then said that I probably speeded up my recovery a bit, by stretching the tendon. Usually he recommends people take it slow and easy, but if I wanted to do the quick and painful way, that was fine my him. I was fully recovered in less than 4 months, when he had projected 6 to 8. My wife still brings it up.