I went for another short run yesterday, and suddenly Runkeeper reminds me I’ve hit another new record; 40km, farthest in a week. Hooray! Of course, not every week is going to start with a 20k long run, so 40km is not a realistic base mileage for me.
Runners who run a marathon having less than 30km weekly mileage, double the risk of injuries according to a study. Some sources set the number higher, at 40km.
I think my ideal mileage would be somewhere around 30km a week, and then some more before long races if that’s necessary.