Hello Igy. This is probably TMI but at least more food for thought:
I’m “only†57 but I’m using some elements of a certain 85 year old’s methodology to train currently because I’ve had a very long series of injuries knocking me out for up to a year at a time. I’m speaking of the great Ed Whitlock. I think he’s up to about 50 or so age group world records now. Everyone focus’ on his famous 3 hour slow runs in the cemetery but neglect the fact that he’s taken up to a year off with injuries and keeps coming back again and again. He graciously shares his training on LR so here is the link to what I think is his real super power:
http://www.letsrun.com/forum/flat_read.php?thread=3200366&page=3
That’s starting at just 10 min a day of easy running and add a minute a day. I tried this in 2014 and found I was not durable enough to do this every day. As soon as I abandoned it I got injured. He races frequently for speed work. I had to modify this because, duh, I am not world class and never will be. Starting in Jan of this year (all documented in this thread) I started at 10 min, jogging 5 days a week. Thus adding 5 min a week. I also cannot handle pavement every day so I mix in trails. I firmly believe in 2 rest days a week…this after injuring myself with 422 days in a row of a streak. Just last week I tested myself to see how slow I got and was surprised to go 6:52, and 6:49 1600’s with almost no speedwork. Once a week I had been doing something hard, either on the trails or a progression. My opinion is you really only need one hard/fast/speed/race day a week at our ages.
But as is so often said here, each of us is an experiment of one.
If I were to answer your question when I just turned 50 it would have been wildly different. Then, my max distance was 18 miles a week, 5 days a week. Nothing was slow and I averaged close to and sometimes under 7 min per mile each week. I did hills on Tuesday’s and 400’s and mile repeats on Saturdays. Sundays were the lone longer run. My 5K PR then was 18:47 and 5:30 for the mile. I was, embarrassing to admit now, a bit of a jerk that thought I knew everything. I would have insisted that low mileage high intensity training is the ONLY way to go. At 52 the wheels fell off and it’s been a steady diet of humble pie ever since. For me there is a huge difference between my 50 yo self and now.
I consider myself to be lucky to be running at all. More than a few times I got so damn tired of being injured I just quit. As mo’pak answered to Hoser, eh above, it’s got to be easy and fun or it’s just not worth it. The science supports working on the aerobic system and slow fun running will get it done. To race though, I think most agree you do have to do something fast periodically.