Thanks for the suggestions and advice. I'm recovering after a good run yesterday and fastest marathon yet--but still have LOTS of room for improvement. I'll probably try to start some weights towards the end of the week or first of next week so I have some recovery before getting started. Regarding ...

I'm a 37 year old female. I've been running for about 4 yrs. I'm a slow runner but I have completed 2 marathons (and will run 3rd in Houston this Sunday), 3 - 50K's (31 mi), and attempted a 50 miler. I've also done share of shorter races. I have increased endurance, obviously, but speed has never im...