I've been finding myself flagging a bit after walking 14-15 holes and losing concentration. Talked with a playing partner who also walks but road in a tourney last year and scored 5 strokes better per round on avg. Wondering if others notice a difference in their scores either way. I prefer walking for the exercise and the time to think about my next shot while walking to the ball, but may have to invest in some caffeinated energy bars for the back nine.