Background and Study Aim : In the practice of sport training the anaerobic threshold (LT2) is sought using a whole range of methods. As a result, different LT2 values are obtained and applied to programme endurance training. The aim of the research are the relationships between the main indicators of the five methods applied to determine the lactate anaerobic threshold judo athletes.

Material and Methods : In the study, 19 judoists at international and national sport level going through a preparation period for competition performed a graded incremental exercise test (GXTs) that met the requirements of all five methods. The research used five methods that are usually applied in training practice to analyse the blood lactate concentration curve: LTvisual, LTloglog, LT4.0, LTdel1, and LTD-max. LT2 values generated by LTvisual, LTloglog, LT4.0, LTdel1, and LTD-max methods were used to build regression equations for determining LT2 based on LT4.0 values.

Results: The experiment has showed that judoists, like other athletes, have a specific profile of running velocities at anaerobic threshold. The range of running velocities (VCR) at which their maximal oxygen uptake (VO2max) was recorded points to a relatively wide range of work rates that can be applied to build the aerobic endurance of judoists at similar levels of sport accomplishment. With the exception of LTD-max, the other methods of lactate curve analysis produced very similar running velocities at anaerobic threshold (VAT).

Conclusions : This study shows which methods can be used interchangeably for training purposes without the risk of running velocities being considerably different. It has been found that VLT2 values obtained from LT4.0 method are the most similar to those generated by the other methods