• If his right shoulder is more in line with the inside of his left leg, with a little more arch in his lower back, it means his back is feeling good. He's not avoiding putting weight on it.

• When he leans his upper body so far forward that his right shoulder drifts too outside his left leg, with less arch in his lower back, it means he's compensating to avoid putting weight on his lower back.

A deeper dive on how Tiger's swing has changed right here.