I was reminded by questions in another thread that I should write this up. In some ways its obvious but I think good to understand a little more.
http://hikingscience.blogspot.com/2010/08/why-moving-little-too-fast-can-cost-you.html
by Ze » Sun Aug 29, 2010 9:54 pm
by Jukka Ahonen » Mon Aug 30, 2010 7:36 am
by Brad Marshall » Mon Aug 30, 2010 5:27 pm
by ClimbandBike » Mon Aug 30, 2010 5:31 pm
by Ze » Mon Aug 30, 2010 8:02 pm
Brad Marshall wrote:This sounds like a good explanation of the "dash and crash" climbing style. I certainly enjoyed reading it but since I've never been it that great of shape I wouldn't mind reading something about your fourth category.
by Brad Marshall » Mon Aug 30, 2010 10:31 pm
Ze wrote:lol, well there's a similar effect between fat and glycogen use. the slower you go the more fat you use so you spare glycogen and you'll be able to go for longer. unless you're at 3% bodyfat!!!
by Pete Castricone » Tue Aug 31, 2010 12:50 am
by Ze » Tue Aug 31, 2010 4:39 am
Brad Marshall wrote:So the new "light and slow" climbing style my friend (RIP) and I started developing over the past couple of years appears to be on the right track. I'm certainly not in a hurry to get to the top and don't mind losing a few pounds along the way.
PS. It's not that I'm not in shape. As my wife always says "round's a shape".
by Ze » Tue Aug 31, 2010 4:40 am
castricone7 wrote:What?? Where exactly does the snickers come into the picture?
by Jukka Ahonen » Tue Aug 31, 2010 7:52 am
FortMental wrote:Dubzion wrote:So did I get this correct:
Due to altitude and pressure's effect on the ability to get oxygen into bloodstream, the aerobic threshold drops to a lower level, thus leading anaerobic burn at a lower pace?
That's only a first order approximation.
by Cy Kaicener » Tue Aug 31, 2010 9:10 am
by foweyman » Tue Aug 31, 2010 11:37 am
Ze's reference wrote: Well you should know that altitude has lower pressure and it's harder to get oxygen into the bloodstream and to the muscles. This means that if you are moving at a certain speed / workload, you are getting less of your energy from aerobic glycolysis, and more from anaerobic glycolysis!
Ze's reference wrote:When you are hiking the last few miles up to the summit of Mt Whitney, you are already going slow as you can because of the low pressure
by Ze » Tue Aug 31, 2010 2:48 pm
foweyman wrote:Ze's reference wrote: Well you should know that altitude has lower pressure and it's harder to get oxygen into the bloodstream and to the muscles. This means that if you are moving at a certain speed / workload, you are getting less of your energy from aerobic glycolysis, and more from anaerobic glycolysis!
I'm not doubting that there is an altitude effect, but it needs to be explained better. The above statement would be true only if the oxygen uptake rate was already at or near maximum, and couldn't be increased. It fails to account for the ability to increase the oxygen uptake rate by breathing faster and thus returning to the original aerobic/anaerobic ratio. Of course, breathing faster slightly increases the workload and oxygen needs, making it impossible to maintain the same hypothetical speed and workload as altitude increases.Ze's reference wrote:When you are hiking the last few miles up to the summit of Mt Whitney, you are already going slow as you can because of the low pressure
In addition to the missing word, this certainly isn't true. Although I'm sure others have been to the top of Whitney more than I have, I've never seen anybody move "as slow as they can" as they approach the summit.
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