|   Lactate Threshold | Spacemoose
Mar 7, 2002 3:39 PM | | How do I find mine? Have my resting HR (measured over time), and my MHR (measured by hurting myself running and riding), but how can I accurately measure my LT?
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| re: Lactate Threshold | GSlug
Mar 9, 2002 4:03 PM | | Take the average heart rate for the last 20minutes of a 30minute time trial. Rest for two days before attempting. Don't stare at the HRM, don't even ride with it visible if the first time you attempt this. You have to be totally focused on riding just beyond the point where breathing becomes labored and thighs are uncomfortable. If you blow up before thirty minutes, subtract a few beats and try again next week.
I was a little skepically about this being an accurate measure as doubted LT could be held for 30minutes. I typically measure by increasing power 50 watts every minute until a blow and look for the point where the rate of increase slows. Using this method you hold lt for 1minute and go above for 3 - 5minutes.
The average of the 30minute time trail came in at 179 and the old method usually says 178. |
| re: Lactate Threshold | Andy
Mar 12, 2002 6:13 AM | | I would be very skeptical of this method, a 30 minute time trial is ridden at a pace you can only sustain for ~30 minutes. Your LT is the last pace/work rate/VO2 that you can sustain theoretically forever, fatigue only occuring when you run out of substrate. So unless you are in the world class league your pace will not be high enough to exhaust your fuel supplies in half an hour. The pace you are measuring is likely to be close to critical power rather that LT. |
| re: Lactate Threshold | GSlug
Mar 13, 2002 7:40 PM | | I got the technique from J. Friel's Training Bible. I haven't looked at it in a while, but I think that I have described it accurrately. Anyway, the results seem to be in-line with what I expected. |
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