Weird Lab Test Results

  • Creator
  • #58667

    I’ve done lab test in 2019 and again this year (same lab, same protocol). My results are quite weird because speed compared to HR is increased but thresholds decreased.

    AeT – 158 @ 6.2km/h
    LT – 177 @ 7.2km/h

    AeT – 153 @ 7km/h
    LT – 172 @ 8.2km/h

    During the entire summer I was training mainly under my AeT so I expected my threshold to increase rather than decrease…

Posted In: Mountain Running

  • Participant
    Eddie on #58727

    Hi wk.mat,

    I assume your testing protocol followed the suggested UA guidelines (15+ min warm-up, gradual increase in intensity, 3+ min stages, fixed incline to speed or vice versa, etc)?

    Some thoughts, but I’m no expert.

    Pace is a better measure for intensity (and more performance relevant) than HR. Your aerobic and anaerobic capacity clearly improved in speed. I have no explanation as to why your HRs decreased.

    Is a 5 bpm difference even significant? Could other factors like hydration, stress or body temperature account for this? If it is significant and HR is representative of intensity, I’d expect AeT to increase and AnT decrease if only aerobic work was done. Conversely, I’d expect AeT to decrease and AnT increase if more anaerobic work was done. Here we see a decline in both HRs, but an increase in speed. Interestingly, AeT/AnT ratios are similar. I don’t know, given 2 samples 2 years apart.

    Regular testing (every 6 weeks to several months) would be more informative to determine training effectiveness. If not in a lab, then at least AeT drift or lactate tests, and AnT field tests.

    Anonymous on #59357

    This shows your training has paid off. You were running significantly faster at lower heart rates. That’s what matters.


    wk.mat on #59376

    Thank you for your response!
    I’m definitely happy with my performance but this AeT threshold decrease is disturbing. Now it keeps bugging me that maybe I’m doing something wrong. Especially when I read in your book that regular training under the AeT will increase this treshold, while mine threshold has lowered.

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