I'll hit the highlights and save you all the sordid details...
In sports since I was 7yo (American football).
Didn't skip any grades; but as with DM, skipped more than few classes.
Basketball, track (state HS long jump champ in '84), and football in HS.
Football and track at Univ. of Wash. Pac-10 (conference) long jump champ '85 (25'11 1/4"). 4.38 40yard dash. 10.7 100m. 35" vertical jump. 385lb bench press. 320lb power clean. 10' 7" standing broad jump.
Brief NFL career with several teams. Claim to fame is being dragged across goal line by Barry Sanders in last game of '89 season
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Started cycling in 2006 because a co-worker had a really cool looking race bike (Trek 1000) and I hadn't ridding a road bike since they were called '10 speeds', probably 25+ years ago. Several days later I had my first road bike, Specialized Allez Triple. 2 weeks later I was in my first race - got dropped after 3 laps on a flat crit course in Cat 4/5 race.
Various successes on the road (many top-5 finishes in flat crits), but I believe my calling should be on the track. Numerous first place finishes, mainly in the scratch races (condensed crits) and sprint events - Keirin, Miss-and-Out, Chariot, Match Sprinting. I like the track, but I prefer the road racing as it's more of a challenge due to the greater level of endurance involved. Further, I'd much rather ride outside.
Endurance sports for me is 'putting a square peg in a round hole' with my muscle type composition, but the journey has been extremely fascinating and the acquired knowledge thus far has changed my entire outlook on training and nutrition, such that I could never see myself becoming unfit - even as my age continues to advance.