Exercise may be the single most potent medical intervention ever known

- a knee injury when he put bands on my knees to do a "reverse wall sit", and I slingshotted out of it, knocked down a barbell, and the barbell hit my right knee

- had arthritis in my right shoulder; power lifting aggravated it to the point I had to stop doing most upper body stuff. It's better now, but still can't do anything heavy with it

- grabbed a slam ball from the floor, hoisted it up to my chest, my right pinkie hit my left hand and broke/jammed/sprained my pinkie pretty bad. Still hurts sometimes months later.

- developed tennis elbow mostly in my right elbow, some in my left. Had to cut out weights again, stick with bands for a couple of months, still bothering me

So if you do start a training program, please go slow, especially if you have never trained in your life like me. Your muscles will develop much faster than your skeletal support system and it's pretty easy to hurt something that may take a long time to heal.

If I had it to do over again, I'd probably stick with just body weight stuff and very light weights for at least a year before moving on to heavier weights, even if the trainer says I can handle it. I could, for a while, but it caught up with me.

I have to add, I am still in better shape for having exercised than I was before, even considering the injuries. I had a pretty serious illness, lost 40 lbs (I was 170, 6'1, got down to 131), and nearly died. Training saved my life and got me back up to 165.