Before I haddta stop (due to any exercise seemingly perpetuation an injury) the medicine ball toss - OMG.
It was killer. I had a dirt road, and a dirt trail around the property, so invented a cross-country course, maybe 200 yards. A big loop, not level, just rugged rural dirt road. Could be a walking path, running trail, or huge lawn...
Instead of a soft medicine ball, I used a rock (cheap, won't roll away) Probably weighed 10 to 12 lbs.
The idea is, basically like a squat, grabbing the "ball" with both hands, dynamically standing, launching the ball. I got mine maybe 15 feet. Thud. Walk/jog ahead, squat to pick up ball - repeat. Squat, grab it and really launch it...!
Awesome low-impact cardio full range of motion workout/exercise. Plenty of ideas using med balls/medicine balls (both kinds) on youtube.