I've been sidelined for about 6 months now. I ran in junior high and high school, quit when I was in my early 20s and started up again around 25. I'm turning 35 soon and I've run two marathons (3:30:16), some halfs (1:35:30) and too many 5 Ks and 10 Ks to count (19:00 and 41:30). I'm nowhere near my best times from high school though. I guess that's what happens when you are twice as old and 25 lbs heavier.