Harnish, C.R.; Swensen, T.C.; King, D. Reliability of the 15-s Maximal Lactate Accumulation Rate (VLamax) Test for Cycling. Physiologia2023, 3, 542-551.
Harnish, C.R.; Swensen, T.C.; King, D. Reliability of the 15-s Maximal Lactate Accumulation Rate (VLamax) Test for Cycling. Physiologia 2023, 3, 542-551.
Harnish, C.R.; Swensen, T.C.; King, D. Reliability of the 15-s Maximal Lactate Accumulation Rate (VLamax) Test for Cycling. Physiologia2023, 3, 542-551.
Harnish, C.R.; Swensen, T.C.; King, D. Reliability of the 15-s Maximal Lactate Accumulation Rate (VLamax) Test for Cycling. Physiologia 2023, 3, 542-551.
Abstract
Background: The purpose of this study was to ascertain the reliability of two 15-sec sprint cycling tests in men and women to estimate the maximum rate of glycolysis or lactate production (VLa-Max). Methods: Eighteen men and twelve women completed two sprint sessions over 1-week. A 10-min warm-up preceded a 3 µl blood lactate (BLC) sample, after which a 15-sec sprint was completed; cyclists then rested passively while multiple lactate samples were taken until levels peaked. VLaMax was calculated as (Peak BLC – Pre BLC) * (15-sec – Talac)-1. Trial differences and reliability across trials were analyzed using a paired-sample t-test, Pearson correlation, ICC, and Bland-Altman analysis with α=0.05 for all tests; data are reported as mean ± sd. Results: Power (W) was similar across trails (773.0 ±143.5 vs. 758.2 ± 127.4; p = 0.333) and coefficient of varia-tion (CV) of 4.7%. VLaMax was similar (0.673 ± 0.024 vs 0.635 ± 0.237; p = 0.280), but only moder-ately reliably across trials with a CV, ICC, and R value of 18.6%, 0.661, and 0.67, respectively. Conclusions: A 15-sec VLaMax cycling sprint is moderately reliable being affected both by the lac-tate measurement and other variables used in the calculation. More research may offer ways to improve reliability.
Copyright:
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