Record face-on and mark your head height at address with a line on the screen. Hit balls at 70%, checking that your head doesn't rise before impact. The feeling is of covering the ball with your chest on the way down.
Contact on the ball's equator or above; on video, chest height rises before impact or the lead arm arrives bent.
Frequently asked questions
What is the "Chest at the same height" drill for?
Stay in your posture until after impact
How do you do the "Chest at the same height" drill?
Record face-on and mark your head height at address with a line on the screen. Hit balls at 70%, checking that your head doesn't rise before impact. The feeling is of covering the ball with your chest on the way down.
How long does the "Chest at the same height" drill take?