I am an, about to be, 44 year old cyclist in Colorado. I began by bicycle racing career at the youthful age of 36. After 3 long, hard, frustrating seasons of being little more than pack-fill, i began training with a coach, and with my Polar S610. My fourth season came with me attaining PR's in the Cherry Creek Time Trial Series, a local 7 race series that starts the season here in Colorado, a PR at the Bob Cook Memorial Mt. Evans Hill Climb, and my first 2 wins, one at the Coal Miners Classic Circuit Race, and another in the Snowy Mountain Road Race, the opening stage of the Dead Dog Classic Stage Race. Since experienceing those successes, I've upgraded to a cat 3, and will never train without Polar again! Thanks Polar!!!