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24-01.-2006, 06:40 AM
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#16 | |
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Registered User
Join Date: Oct 2004
Posts: 1,019
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Re: Level 4 Training question (2X20 = 1X40)
Quote:
I have to question this. Do you think the adaptations are any different (not greater/lesser, just different) training at the middle of l4 vs. the bottom or top? In my mind, it's all the same. In fact, I saw a post by Andy Coggan on topica the other day (the post was pretty old, I was searching the backlog) where he stated that the adaptations to training l2-l4, a huge zone, are all the same. What differs of course, is the rate of adaptation and the amount that must be done for overload. As far as your question about 1x40 vs. 2x20, I think that it may be an interesting one physiologically, but has little practical application, because the differences between the two will be masked by the probably higher average watts during 2x20's (due to them being mentally easier) and any other environmental factors that keep wattage from being absolutely dead-on. (heat, fatigue, a dog in the road, etc) |
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24-01.-2006, 07:19 AM
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#17 | |
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Registered User
Join Date: Jul 2003
Posts: 2,622
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Re: Level 4 Training question (2X20 = 1X40)
Quote:
The "metabolic event" in question is the rate at which the energetic state of the cell changes in response to changes in ATP demand. Blood lactate concentration will reflect this energetic state, but with much slower kinetics. |
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24-01.-2006, 08:24 AM
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#18 | |
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Registered User
Join Date: Aug 2005
Location: Canada
Posts: 1,234
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Re: Level 4 Training question (2X20 = 1X40)
Quote:
In your opinion, does lactate curve continues to rise after lactate level at FT power have been reached? Or does it just stabilize itself right there, with no more fluctuation? IOW, given that your lactate level at FT power after 20 minutes, is 3.0 Mmol/L, do you think you finish the whole duration (60min) at 3.0 ? |
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24-01.-2006, 10:22 AM
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#19 | |
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Registered User
Join Date: Apr 2005
Location: Kansas City, USA
Posts: 3,689
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Re: Level 4 Training question (2X20 = 1X40)
Quote:
For intensities below MLSS, I would think the removal rate is eventually able to match the production rate, resulting in a stable lactate value. Once MLSS is exceeded, then lactate production exceeds the maximum removal capacity and concentration continues to rise without reaching a steady state value. Regarding the chart (I presume you mean the one on Andy's page 5) it looks like lactate keeps rising over time and eventually shoots off the chart. But note that it's plotted vs. *power* (not *time*), which means that lactate is rising *as power is rising* -- IOW, during a ramp test. If power is held steady below MLSS (as during a long L4 interval), then presumably lactate would steady out as well. Because of the lag time in lactate buildup and migration to the blood (per Andy's post just above), you'd need some more info in order to tell if that chart represents the athlete's steady-state lactate values at each power level, or lactate values for a ramp of some certain w/min value. The slower the ramping, the closer the plotted lactate values would match the steady-state lactate v. power curve. I think it was Biker-linz who once mentioned that the mechanisms which cause long-term fatigue were still largely unknown, so I wouldn't know whether lactate *eventually* begins to rise again at the end of a long ride. I wouldn't think that kind of long-term fatigue has any relevance to rides of ~1-2 hours (ie, L4), however. FWIW. Hopefully Andy will reign me in again if I've over-assumed something else.  |
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