Water is the drink of choice. Only two of the players interviewed didn't have a specific stretching routine as part of their warm-up. And both of them said they loosen up with a series of long, slow swings with a weighted club before hitting any shots. The rest of the pros either stretch out before leaving their hotel or in the locker room. This is the primary key to injury prevention.
Preround swings are all about finding a comfortable tempo and balance.
The tempo needed for good bunker shots transfers well to the full swing. The pros try to avoid overloading on swing mechanics before the round. So it's very important to focus on alignment during your warm-up. Shorter clubs put less strain on the body at impact. Save the driver until your muscles are completely loose and your swing is on track.