Three-time Major Champion Padraig Harrington explains how to maximize clubhead speed by focusing on 'intention' and a proper hand release. He demonstrates why practicing with a short backswing can lead to more power in a full swing and how to use ground forces by pushing the hip away rather than spinning. The video also covers the use of carbon fiber insoles and SuperSpeed training aids to establish a speed baseline.
Intention is the most critical factor; you must mentally commit to swinging faster to see physical results.
The 'Quick Cease' drill (stopping at impact) helps train the hands and arms to release the clubhead instead of holding onto it.
Effective ground force comes from pushing the hip out and away from the ball rather than simply spinning the body.
Leverage requires the top of the lever (hands/arms) to decelerate so the bottom (clubhead) can accelerate through impact.
Establish a speed baseline using training aids to monitor your daily 'explosiveness' and fatigue levels.