I recently decided to test for my (estimated) LT. I have a pretty decent understanding of lab analysis and glycolosis (am a doctor)... so I figured that it probably wouldn't be too hard to conduct my own blood tests.
I purchased a LactatePro meter, studied various charts and graphs in anticipation of organizing my data into something meaningful, and off I went.
Based on everything I thought I knew, I expected to see my lactate levels rising with work load, but here are the results I got: HR 144 - 2.6 mmol/L HR 150 - 3.2 mmol/L HR 155 - 3.2 mmol/L HR 161 - 4.1 mmol/L HR 165 - 4.7 mmol/L HR 170 - 2.9 mmol/L (followed by a confirmatory test of 2.2mmol/L approx 1.5 minutes later).
The results were obtained by performing a slow warm-up to gradually reach desired HR, followed by running a 5 minute lap. I stopped running to perform the tests, but drew blood as soon following the cessation of activity as possible (within about 30-40 seconds). Once I recorded my results, I began the next interval about 2-3 minutes after the previous one (following the same procedure).
Testing was performed outdoors on a flat surface at temperatures of approximately 65 degrees with a slight breeze, and the device was calibrated prior to use.
Once I saw that my lactate levels had dropped at HR 170, I gave up and scrapped the rest of my testing for the day. I then went for a 3 mile run at avg HR of 176 and measured 4.1 mmol/L after my run. My max HR is 186.
If my body is utilizing and clearing lactate efficiently I suppose it could explain the drop I saw during testing, but it's not so great in terms of trying to graph my results and determine LT. Any other ideas on what might have happened with my data?
If anyone else has ever had a similar experience or could offer advice on how to better conduct the tests, I'd very much appreciate it.
FYI - I also attempted testing on a treadmill to avoid having to stop activity during testing, but lactate levels were abnormally high and weren't consistent with outdoor tests.
Thanks a bunch!
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