Your Anaerobic (or lactic) threshold is defined as the maximum amount of oxygen your muscles can utilize w/out producing lactic acid, is it not?
So, if I were to run for an hour at my AT, there would be little to no lactic acid build up in my muscles when I finished, right?
Assuming I'm correct, why can't I simply run at my AT until my body runs out of glucose to burn? Can I? How long does it typically take your body to burn off a peanut butter and jelly sandwich while running at your AT?
An hour at AT is one hour race pace. You need sleep, energy, and recovered muscles. Obviously you can't run forever. The body would not support the impact or the energy demands on the various systems. That's why even the dude who did 300 miles didn't really do it without stopping; he just did it without sleep.
True enough. I've heard of sleepwalking, but never sleeprunning.
no no wrote:
An hour at AT is one hour race pace. You need sleep, energy, and recovered muscles. Obviously you can't run forever. The body would not support the impact or the energy demands on the various systems. That's why even the dude who did 300 miles didn't really do it without stopping; he just did it without sleep.
there was no dude who ever ran 300 miles.
the only person to accompish this was pam reed, a dudette.
dean karnazes FAILED in his attempt.
Your body is always producing lactic acid, even when you run at below lactate threshold (LT). It's just that beyond LT, your body produces lactate faster than it can clear it.
Running does more to your body than just consume fuel. It also damages and fatigues muscle fibres themselves.
Your body is always burning glycogen in SOME amount, even below LT. At some point you run out (you only have enough in you for a marathon, they say). At that point, you start to feel like crap as your body is forced to rely completely on fat, not it's preferred fuel mixture.
Finally, remember chemical changes are going on in your body all the time that are no doubt accelerated by running. At some point, you need SLEEP if nothing else.
lotsa miles wrote:
there was no dude who ever ran 300 miles.
the only person to accompish this was pam reed, a dudette.
dean karnazes FAILED in his attempt.
There was a story on the front page of Letsrun.com just a few weeks ago about a male completing 316 miles. Look it up.
Fair enough.
So how long could your average male runner w/a healthy, balanced diet run at his AT before he started to burn fat rather than glycogen?
lotsa miles wrote:
no no wrote:An hour at AT is one hour race pace. You need sleep, energy, and recovered muscles. Obviously you can't run forever. The body would not support the impact or the energy demands on the various systems. That's why even the dude who did 300 miles didn't really do it without stopping; he just did it without sleep.
there was no dude who ever ran 300 miles.
the only person to accompish this was pam reed, a dudette.
dean karnazes FAILED in his attempt.
You can't run forever for the same reason you tire in a marathon or a 100 mile race. The muscles can only take so much physical damage. It's like taking a hammer and pounding your muscles over and over. Eventually the structure of the muscle goes to hell. Look at a biopsy of a pre and post marathon muscle. Pre-marathon your muscle fibers are nice and ordered. Post-marathon they look like a webbed mass. Your muscles contract because of a specific order of things. If you mess with that order the muscle fiber won't contract.
Alan
no no wrote:
There was a story on the front page of Letsrun.com just a few weeks ago about a male completing 316 miles. Look it up.
oh, my mistake. too bad for karnazes. beaten to the punch again. of course with his self pomotional ways, he will still claim to be the first man to run 300 miles.
lotsa miles wrote:
oh, my mistake. too bad for karnazes. beaten to the punch again. of course with his self pomotional ways, he will still claim to be the first man to run 300 miles.
Moreso too bad for you in that you'll soon run out of topics about which to bash Karnazes and need to find an elite runner to be your victim. It's that dead time in the season after track and before cross-country. Dear you...who are you going to bash now, troll?
no no wrote:
Moreso too bad for you in that you'll soon run out of topics about which to bash Karnazes and need to find an elite runner to be your victim. It's that dead time in the season after track and before cross-country. Dear you...who are you going to bash now, troll?
who are you kidding? karnazes is no elite runner. he's an elitist.