I had been told that doing exercise like squats, running, jumping, etc will cause knee injury when we age.
As we do those exercise we are rubbing the soft bone together and as time passes the soft bone will degenerate due to use.
I wonder if it is true. I have been doing a lot of leg exercise recently and do not wish to have problems when I grow older.
This is a point I read when looking through websites:
Cartilage in the knee begins to break down and leaves the bones of the knee rubbing against each other as you walk. Persons who work in a place that applies repetitive stress on the knees are at a high risk of developing this condition.