90 Minutes (~14 Miles) A Day

I would get a stress fracture, but if you can make it work, I see no reason not to do this.

maybe alternate 60-70 min. runs in between.. it seems like doing 90 mins. eveyday might be too much right away.

this time last year i started a similar quest to yourself,but not with the aim of running a marathon,just wanted to see what happened. Week 1 I ran 60 mins per day mon-sat and 70 on sunday. Week 2 i ran 65 per day and 75 on sunday. I continued this right up to running 100minutes per day mon-sat and ended up bumping the long run to 180mins (made a few jumps of 10mins per week with the long run). Net result: After 15weeks of this I was in some of the best form of my life and ran a road 10k pr. A lot of the long runs I found I ran the last hour quite quickly (sub 6min pace) as I was so aerobically fit, though I never set out with this intention,just happened. Tried to sustain my tunover with some strides every other day. Again increased the number of strides week on week. Started at 4 got up to 10 and held it there.

Simple works. I was living in this small town in New Brunswick one year and over the winter could only run at night cause of busy work schedule. The town had some well lit streets, but really the only decent route was running the perimetre of the town, which took me most nights about 37min (about 7.5km). When there was a lot of snow on the ground it was more like 40-42min. I started with one loop after work in October and by January was running 2-3 loops every night for 15-22km daily.

I figured I was putting in between 13-15 loops a week for around 100km. Most all was at easy pace on acount of slippery conditions, but when the streets were bare I ripped through the laps as fast as I could (28:xx was fastest I recall). By the time April rolled around I was in wicked shape and dropped from 38:20 in first 10km race to 36:40 and then to 35:20 by end of May as I got into the speedwork a little more. Finished up the season in September running 34:52, 17:02 5km, 1:17.04 HM and only really raced and did tempo work all summer, and on 40mpw. I credit this modest success to the steady miles built up over 5 months of fall and winter running.

was that all easy and steady mileage except for that long run?

I did a few months of daily 80-90 minute runs all run at whatever pace i felt like that day. I ended up in amazing shape but i didn't race anything so i don't know how much of an improvement i actually achieved.

HOWEVER, i didn't take any easy down weeks and it led me to burnout/overtraining. YOu know yourself best. But if i did this again (and i will) i will stick in some recovery there somewhere.

I ran a similar schedule in 2007 except that my usual daily run was 2 hours, at a very easy pace. I wasnt concerned about the pace, just putting in the 2 hours/day. I was pretty much lolly gagging out there for 2 hours/day. I PR'd in everything from 5K through the marathon, ran 15 marathons and qualified for Boston 13 times with no speed work other than 5K races. At age 63, I usually won my age group. As long as you build up gradually and control your pace (under 70% of max. heart rate would be good), then you should not get hurt and you should not be tired, ceteris paribus.

http://en.wikipedia.org/wiki/Ceteris_paribus

I appreciate all of the stories. I guess I will try to keep it up, maybe with a down day or two every week, at least for a while.

I am pretty sore, but I probably would be regardless of how I started increasing my training regimen.

I also plan to add a speed workout in every week, although I won't start that for about a month. With that, I just plan to do 30 min warmup, do the workout, and then do 30 minute warm down.

Crazy that this dude is probably dead now

I rarely had any runs that were much shorter than 90 minutes for decades. It really all comes down to recovery. If the runs are too intense to allow for decent recovery you'll likely have trouble. If not you should be fine.

How many days/week, and did you have down weeks?