Impact The moment in the swing when the club strikes the ball. (Betsy's feet slipped at impact, resulting in a poor drive.)

Inside-to-In A description of the swing path that, all things being equal, will produce the greatest percentage of solid, straight and on-target shots. It refers to a path in which the clubhead travels from inside the target line, to impact, and then back inside the target line. (Once she developed an inside-to-inside swing, her ballstriking improved dramatically).

Inside-to-Out A swing path in which the clubhead approaches the ball from inside the target line and, after contact, continues to the outside of the target line before turning back to the inside of the target line. (Every so often, his inside-to-out swing path resulted in shots that missed the target to the right).

Intended Line of Flight The direction a player plans for his ball to begin after impact. (Because she planned to hit a hook from the tee, her intended line of flight was at the righthand fairway bunker).