Thanks to all for their experiences shared. Here's my .02.
I'm 58 and running has been part of my life since I was old enough to do more than walk.
HS comp went OK. CC was my favorite over track. College, not so good. My light frame couldn't handle the magnitude of speed work it was introduced to. Shin splints and stress fractures nixed any new PR's.
Took 3 years off of racing once I got out of school. Found X-c skiing to be great fun and healed the mid tibial injuries in the process.
Beginning in 1976, running became my "all in all" for 7 years. During that time I ran 2 Bostons, Pikes Peak, a couple 50 milers and more shorter races than I can becin to remember. My PR's all improved and my friends and I regarded A.Lydiard as a God.
Enter mid-life responsibilities and a 20 hiatus from the sport. Gain a tobacco habit, 35#s, and a host of questionable number on the blood profile. Ahem.
Time to regroup. Started training lightly in the fall of 2002. Got lured into a 5K by my adolescent daughters.
Struggled to walk in at 59 minutes plus.WTF!! This can't be, my PR was 15XX. Though sorely tempted to throw in the towel on the whole idea of a comeback, something in me wouldn't let it go. Skiing had redeemed my running once so I went back there over the winter. The pounds gradually started to drop. Spring brought a return to running, and by mid summer I was knocking out 12-15 MPW. By fall I went back to that same 5K and recorded a 24XX. Patience became a necessary friend. To rush the process only bought injury.
In August of 2004; 22 months after initiating the comeback I stood at the starting line of a Marathon. THe resultant 4:29 was a long way from a PR 2:26 run 23 years earlier. But the simple act of running was getting easier. The tweaked calves and sore hips were less frequent. I came to accept my body as that of a 50year old and work with on kinder terms.
Key words: Patience, consistency, cross-training, nutrition, and attention(i.e. if it hurts,don't)
Geez,I've blabbered on too long. Enjoy the process, a body in motion beats the other options.