Ironically, b/c never-taking-a-break was my thing, I actually ran fewer miles overall. I was always saving myself for the next day, and the day after that, and the day after that. When I first started, it was about 10/wk. It increased in fits and spurts, but I doubt I ever hit 40 in any single week.
And if a sprained ankle normally takes, say, a week to recover from, running on it those 7 days turned it into about a 3-week recovery time, so I was back to running 1.5/day when someone else might have been back up to 4-5/day.