Achieving a pull-up is a significant fitness milestone for many people. First one, then maybe five, 10 or more: "The ability to do pull-ups is, in my book, an impressive sign of fitness and not a ...
What it's supposed to do: Train lats, upper back, and biceps. What it actually does: Unless you have very flexible shoulders, it's difficult to do correctly, so it can cause pinching in the shoulder ...