Rates of maximal blood lactate accumulation in the extreme intensity exercise domain: implications for training prescription
Makaleler > Tam Makale · 2026
Yazarlar: Özgür ÖZKAYA, Hakan As, Arda PEKER, Mark Burnley, Andrew M. Jones
EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY, SCI İndekslerine Giren Dergi, Uluslararası, Wos, 2026, cilt 1, ss 1-7
DOI: 10.1007/s00421-026-06290-x
Özet
Purpose This study investigated the rate of blood lactate accumulation (vLa) across six maximal sprint efforts and identified a breakpoint (vLa(BP)) in the vLa-power relationship. Methods Twelve physically active males completed 5, 10, 15, 20, 25, and 30-s all-out sprints in randomised order on separate days, with resistances set at 10 to 12.5% of body mass. The vLa was calculated as the change in blood lactate between the resting and peak value (triangle La) divided by the test duration. A piecewise linear regression was used to identify the vLa(BP) and its corresponding power output (P-vLa(BP)) in the vLa-power relationship. Pulmonary VO2 responses were modelled using VO2 data obtained from exercise and the subsequent 15-min recovery period. Results A distinct P-vLa(BP) was identified at 795 +/- 135 W and 11.2 +/- 1.5 W & centerdot;kg(-1), corresponding to a vLa of 0.50 +/- 0.10 mM & centerdot;s(-1), triangle La of 6.50 +/- 1.27 mM, and sprint duration of 13.3 +/- 1.9 s. The vLa did not increase significantly during the 30, 25, 20, and 15-s all-out sprint tests (0.41 +/- 0.04 to 0.48 +/- 0.10 mM & centerdot;s(-)(1); p > 0.05) but increased markedly in the 10 and 5-s tests (0.58 +/- 0.14 mM & centerdot;s(-)(1), p < 0.05; 0.7 +/- 0.20 mM & centerdot;s(-)(1), p < 0.01). VO2 on-kinetics below the P-vLa(BP) (30 and 15 s) was best described by linear function (R-2 >= 0.96; SEE <= 272 mL & centerdot;min(-1); p < 0.001), while the VO2 data could not be modelled for sprints performed above the P-vLa(BP) (10 and 5 s). Conclusion The present study demonstrated that the P-vLa(BP) separates ranges of power outputs with discrete VO2 kinetics which are characteristic of different subzones within the extreme intensity exercise domain.