Re: Arthur Lydiard's 100mpw training
"To me 100 MPW difficulty depends on how you get to it."
Precisely. 80 mpw on one run a day, 6 days a week can be pretty tough--you're really talking about 12 mile runs EVERY day, and one long run.
On the other hand, if you run twice a day for five days a week, and once a day the other two days, it's much easier to accumulate more miles. 9 mile runs in the morning, with 7 miles (alternating between easy and hard) in the afternoon, with a longer run on one of your one-a-days and an easy 6 or 7 on the other--that's what? 100-105, depending on how long your longer run is? And that's with only one run a week over an hour, and only three or so hard sessions scattered among 12 runs. Much easier than (probably) six runs over an hour, and two or three hard sessions over six runs.