I also have a bad knee, I guess from repeatedly hitting the ground with it while playing handball when I was young(<20). It started to be really painful in long

I also have a bad knee, I guess from repeatedly hitting the ground with it while playing handball when I was young(<20). It started to be really painful in long car rides, whenever I standed up for long times or had long walks but it never bothered me when I had played some sport. A year ago I got into a gym and I feared that my knee would break down, amazingly I learnt what you refer to, that weight lifting is one of the best ways to strengthen muscles that are important to the joints. When I thought of weight lifting I just thought of stressing the body, my idea now is completely different, weight lifting is a way of activating some of your more obscure muscles. Never again I got any complain from that knee.