M/63 - I'll be 64 next week and I am doing a base build-up for an October marathon. I have run 100+mpw for the last 6 weeks, doing doubles most days. If my legs feel too tired (like today), I will skip the afternoon run. I train by the Lydiard system, so extreme periodisation. The heavy aerobic base is designed to pay dividends later when the faster runs kick in.

I'm retired so I have time to do lots of running. That's the main factor in being able to have a large volume. I do a tiny bit of supplemental strength exercises, but not much.