Vijay’s work ethic on the practice range is without equal among his peers on the PGA.  Vijay works out mainly by himself using a variety of swing training aids and drills to reinforce key fundamentals — alignment, timing, club head path — that amateurs ignore at their peril. Here’s a list of four drills that Vijay uses in his practice sessions from a Washington Post interview.

He mentions the Inside Approach as tool to keep the club “on plane” — neither too vertical nor too horizontal — which is essential to a repeating swing.