Well, after several years of teaching myself to swim, and getting frustrated at my consistently mediocre results, I signed up for a swim class. Last Wednesday, I discovered I'd been doing it wrong . . . Who knew that you were supposed to wait until your trailing arm was almost back to the front before dropping the lead arm and pulling . . . All of a sudden I have more power, more shoulder rotation. Instead of taking 12 strokes per lap, it's down to 10 strokes per lap, and a few seconds per lap faster in the bargain. . .