[jim_0068]

In The Secret of Golf, which by the way, has a chapter on the Golfing Machine, there is a secret discovered by a cartoonist who studied the baseball swing of Mark McGwire. He says that both arms don't swing into the baseball or golfball at the same speed, but the left arm should pinch backward against the torso at the moment of impact. How does that stack up with golfing machine principles?

Well, i'm no science buff but i do have some goold ole common sense:

You can't compare hitting a baseball (a moving object at anywhere from 50-100mph) to hitting a golfball which is STATIONARY.

Also, a golf ball compresses A LOT more than a baseball does. So, regarding newton's law of equal/opposite reaction, the "opposite" reaction from hitting the baseball (left arm pinching against the torso) is going to be a lot more than a golf ball.

HOWEVER

This is all kinda moot because the upper left arm IS ALREADY pinched against the upper left chest muscle...its a power source