Box jumps (yes, jumping onto a box) are a proven way to boost clubhead speed. Rory McIlroy’s great at them, and look at what he can do to a ball. The traditional box jump—onto a platform set directly ...

1. Inhale: Inhale slowly and deeply through your nose. Count to four. Make sure to focus and concentrate on your breathing and block out everything else. 2. Hold: After your lungs are completely ...