"The drill is a sequence of 3 strokes freestyle, rolling over to 2 strokes backstroke, and repeating. Because you complete 3 strokes of freestyle, you end up alternating the roll-over on both sides, left and right." MORE INFO
Jim Vance is an Elite Coach for TrainingBible Coaching, and a professional triathlete. Questions or comments can be sent to email@example.com. You can also follow his writings and training advice at his coaching blog, CoachVance.blogspot.com.