Maybe I am lacking understanding here, but how can you assert that I "run my training HMs faster than I could race a HM"? What is so different about a race?
That aside..
Firstly, I'd like to thank you for being generous with your time in repsonding. Though, I have a couple more questions if you don't mind:
I'm not sure I understand what you say about not training anaerobically. that said, it's probably my misconception. I have tried to assimilate as much as I can from Brian Mac's web site, and several books. My understanding is that at high heart rates, it is likely that I am using glucose as a primary fuel source, and it's oxidation is incomplete (i.e. anaerobic), whcih result in the producion of H+ ions -- the burning, acid feeling -- and lactic acid, which is recycled given sufficent time. I understood this process was referred to as glycotic.
My interval programme is normally 6-8x400s and 3-6x800s. I occasionally just warm up (2 miles min) then bash out a 'best effort 1.5miles' .. or 'Personal Fitness Test' in Army speak, then cool down. The pace varies a little, but is normally around 1:15 for a 400 and 2:45 for an 800. recovery is either to 145 HR or a slow jog of equal distance to the sprint.
Thank you for the head's up re time taken for body to kick into endurance mode. the idea of just doing 2.5 miles/morning slowly, was to slowly ramp up the mileage. Obviosuly 2.5m/morning is an extra 17.5 miles a week. Once this is achieved, I intended, as I allude to in my original post, to up the daily (morning) mileage. This leaves me with the evenings free to do my 3 quality runs and my two strength sessions at the gym, and a swim.
I chose 140HR, which is purely arbitrary, becuase it slows me down to about an 8:10-30 mile depending on the terrain. I figured that getting my weekly mileage exlcuding the 3 quality runs to 28 miles a week (4 miles/morning) nice and slow, would prevent injury and do me some good, aerobically, at the same time.
Are you suggesting that I should perhaps condense several days' worth of morning mileage into a couple of longer (say, 4-6 miles) runs, equally slowly?
Thanks in advance.