It's got nothing to do with a brace absorbing stress really.Originally Posted by Richard
Imagine a fast bowler who's elbow extends 10 degrees when he bowls. What this means is that under normal conditions (i.e. no brace) muscles and tendons are providing a force to make the elbow extend 10 degrees. Imagine you then brace his elbow. Now, his elbow is still trying to extend (caused by the bowling action) but it cannot - the contact from the locking mechanism in the brace causes a reaction force on the elbow that must be equal and opposite to the force trying to make the elbow extend. As such, you have extra stress placed on the ligaments and tendons and things in the elbow and therefore there is a greater possibility of damage.
At least, that's the way I see it.