Donovan Rebecchi makes a good point on the "morning vs. evening running"
thread, in replying to the following:
Quoted message said:I say that if you would race doing that, you should train. You might be able to train at a higher
intensity and get a better training stimulus.
Donovan's excerpted reply:
"Sounds highly speculative. It even seems possible from my naive viewpoint that the opposite could
be true (that you may get better training stimulus in a glycogen depleted state)."
My own further comments:
This would seem to explain WHY it is, after all, necessary to take "long runs" to prepare for
marathons, and WHY, for example, Frank Shorter and others have made great success of altitude
training (correct me if I'm wrong, but I think Shorter used to train in the Colorado mountains --
and this is a guy with gold and silver olyimpic marathon medals, and who could pretty much hang with
"Pre" at 3 mi/6mi.)
The opposite view expressed on the "morning vs. evening running" thread, that you are somehow
"damaging" yourself by starting a run with low glycogen, etc., just seems not only counter-intuitive
but also seems completely contradicted by the evidence. Other than the "predictive" value of perhaps
a single run which exactly mirrors your race conditions, it seems that we should welcome the
opportunity to be training in these "low-resource" conditions (e.g., low-oxygen air, low blood
sugar, etc.)
Obviously, there are limits (e.g., go without water for 5k/10k, perhaps, but over an hour or so,
you'd best drink!).