I've spotted on my long runs that if I run to a steady heart rate, my pace (not unreasonably) drops off - especially after a dozen or so miles. I'm interested to know what the physiological reason is - is it to do with scraping the glycogen barrel, or deterioration of my running style (& efficiency), or dehydration, or what? And in a marathon, is it better to maintain a steady pace (as I'm given to believe) or constant HR (does this equate to constant effort?)? I don't intend to race with an HRM, by the way, just train.
Thanks, you lovely lot.
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... however, I'd still like to know the answer :-)
;-)
Dehydration can only account for a very small amount of drift. Only 2% dehydration will cause a dramatic collapse in the ability to keep running.
The time it takes to turn on fat burning and the need to preserve carb stores in a marathon is the best physiological argument for negative splitting a marathon. Noticing drift demonstrates the change in the energy mix.
This comment is derived from data in Noakes - Lore of Running (4th edition - waiting for a birthday to get the 5th!), http://www.pponline.co.uk/encyc/0690.htm and personal experience.
Ye..
"a troll is a person who posts messages that create controversy or an angry response without adding content to the discussion, often intentionally"
doesn't seem quite right in this case.. but the latter part seems to fit nicely.
Actually, the question was one I wondered about for ages too.
Actually, I seem to be trolling you - how's the training going?
Training is not too bad - the orthotics seem to be helping, and it's all starting to feel good again, not just hard work. As soon as these exams are out of the way, I'll be a training animal and knock loads of time off all of my PBs.
Nice dream anyway!
Exams bad. But then, if you will be an accountant...... ;-)
Stalking - yes! That's the word!