Just dropping by, first to say thanks to Marigold and Dan for talking HR stuff at the Expo, and then, I'm afraid, guys, there was quite a lot in the Masters Athletics world about how a disproportionate number of the high mileage trainers of the 1960s to 80s have had heart bypasses and the like due to problems related to an enlarged heart
Low iron count/anaemia might also cause those sort of symptoms, so if the medics have checked your heart, get a blood test for serum ferritin, as well as haemaglobin. I get simlar palpatations, and chest pain, mainly at night, when I've been training too hard, and my iron levels are low.
Also more overall miles per week. The rule of thumb which I find is quite reliable is that you can race for your daily average over the previous 8-10 weeks, x 3 ie 35mpw = 5mp day, x 3 = 15, so on 35mpw you can race well over a half marathon. For 26.2miles, you need to be average 62mpw, though I've never cut it so fine, usually c 70 mpw.
FOr the mid week medium long run, I tend to include some miles at marathon pace or tempo, rather than making it slow. Almost everything else can be very slow, up to the final few weeks when a little speedwork eg parkrun or track session gets the legs moving, and a little boost to VO2 max.
This spring of a 1:44 half I ran two marathons in 3:37 and 3:38. (Though I would have expected the half to be more like 1:40)
Talk about being talked about behind one's back......
But really thanks alehouse, and stickless particularly, and everyone else with the good wishes. I'm just back in Birmingham, after a brilliant week. What better than to have nothing to do but run, and in beautiful weather, especially for the time of year, and across the amazing variety of the English countryside. Yes, alehouse, the 10k yesterday was a PW; interesting rubberiness to my legs which wouldn't push of any more forcefully, though having run so slowly I'm not particularly stiff. And as alehouse predicted, the worst part was one to two hours in the dark each evening, but that was because I had totally underestimated my average pace. Would have been better to do it over a couple more days, at this time of year. Mostly I'm just really shattered after a 192 mile week, and I have a busy day tomorrow, catching up with the day by day account on my blog, and putting in photos, etc. So of to bed. zzzzzzz