Another lurker sticks their h(e)add up... I've read through the whole thread and thought it would help motivate me if I came out, so here goes.
My reason for Hadding is similar to Joes, but obviously I'm a lot slower. I got all my PB's in 2007 at age 39, HM 1:18, FM 2:48. 5k 16:53. After a disastrous Edinburgh Marathon in 2008, I completely lost motivation and have hardly run since. I've tried starting again many times, but get to about 25-30 mpw before overdoing it, getting minor injuries, getting depressed and eating/drinking too much before repeating thecycle. I've also put on 1.5 stone in the last 4 years and am now 13st. I know my problem is that I train too hard and keep looking back to previous training regimes where I could run 7:00mm miles easily and think I can do the same again. But knowing the problem is very different from actually fixing it.
Which brings me to Hadd. I have 2 targets for next year - get VLM GFA time 3:15 at North Dorset Village Marathon and just get round Dartmoor Discovery. I may also do a couple of HM's, but without any targets in mind. I also do a Parkrun every month or so - not sure how that fits in with the regime.
In the last 6 weeks I have been running approx 25-30mpw, mainly at 7:45 pace. i.e too quick especially since all the runs have been hilly. I havent yet measured my MHR (will do on Sat) so am assuming it is approx 178. This week I have started doing Hadd runs. I have done 1x90min (10 miles at 8:57) and 1x45min (5miles at 8:47), both at 131bpm, approx 75%.
I have found doing the Hadds a revelation so far. It's a huge weight off my shoulder not to look at pace all the time. Previously, whatever I told myself at the start of a run, I would always end up thinking 'if I can do 1 mile at x:xx speed, I can get my average down from 8:xx to 7:xx' and I would always end up going too quick.
What I have done is wear my Garmin on the other arm to normal and a seperate HRM on my normal arm. On the Garmin I only display average time and distance, not splits. So I naturally only look at the HRM and just use the Garmin to measure distance and for info at the end of the run. On an uphill Hadd mile I have been doing 9:40mm to maintain HR - there's no way I would have done that if I was using the Garmin.
I'm not sure what the best plan is now. My marathon is in 21 weeks. I need to get to ~50mpw before starting proper Hadd base training, which I hope I can do by end Dec/mid Jan since running at 75% doesn't seem to take much out of me. That leaves 16 or 17 weeks to properly train. I'm not sure whether to do 8 weeks Hadd base traing and then 8 weeks more intense stuff, or do more (or only) Hadd base training. The Dartmoor Discovery is very hilly so I will have to do hills at some point (I live on the edge of Dartmoor so finding hills not a problem!)
One question I have is, what does Hadd do after base training? In the past I have roughly followed P+D, would it be recommended to do this sort of training after a period of Hadd base training? Or should more intense training still be HR based?
Anyway, I'm hoping that I can stick with it and contribute to the thread