Studies on lactate peak in blood following judo match
Journal Title: Journal of Combat Sports and Martial Arts - Year 2010, Vol 1, Issue 2
Abstract
[b]Introduction.[/b] Physiologists are of the opinion that measurements of blood lactate (LA) following a single judo match provide information about mode and intensity of an exertion. However, LA determination in single blood sample after effort ignore lactate kinetics over short-lasting recovery, thus, it is hard to predict the time of achievement of maximal lactate level (peak), and optimal time point of blood sampling. That difficulties appear especially after interrupted exercise of various rest intervals. To detect appearance of peak LA we investigated time course of LA after official judo matches of various durations.[b]Material and methods. [/b]The study has been conducted among male twenty nine polish senior judokas taking part in one-day international judo tournaments. Blood was sampled several times following a first contest of competition. The time points of blood sampling were 1, 3, 5, 7, 9, 11 and 15 minute after contest.[b]Results.[/b] Our finding revealed two-stage change of LA (rise and drop) which may be approximated by U-converted curve (parabola). It had a vertex, which coordinates were corresponded to the peak LA and the time of its appearance respectively. After a match LA rose from +1 min and attained maximal value. Peak LA and its time appearance depended on match duration. After a match of longer match duration (3.5-5 min) mean peak LA was higher and earlier than that following shorter one. Also integrated data over examined time recovery AUC (area under curve) showed significantly higher acidosis after longer matches. AUC and maximal LA significantly correlated with match duration (r=+0.447, r=+389).[b]Conclusions.[/b] The results of our study showed the effect of match duration on post-match LA behaviour following judo match. Further studies should be directed toward finding effect of match`s time structure, especially durations of passive and active phases throughout the whole effort on lactate kinetics.
Authors and Affiliations
Zbigniew Obmiński, Katarzyna Lerczak, Konrad Witek, Małgorzata Pintera
Keywords
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