Your shoulder might be the most mobile joint in your body, but most people don’t realize this also makes it the least stable: the ball of your arm bone barely sits in the socket, held in place by muscles and ligaments.
When those stabilizers are fatigued or worn down, your joint can lose its center, and even start breaking down under the load.
Instead of rotating smoothly in the socket, your shoulder starts shifting and sliding when it's under stress, grinding down the natural shock absorbers (the cartilage) that were meant to last a lifetime.
But here’s the problem: unlike muscle, cartilage has no blood supply, and it doesn't grow back.
So once that grinding reaches the bone, you aren't looking at a week off the gym or off work… You're looking at a permanent loss of mobility and a future of cortisone shots just to get through a workday.
Check for these 5 warning signs before the structural damage becomes permanent: