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Related Experiment Videos

Methodological aspects of maximal lactate steady state-implications for performance testing.

Ralph Beneke1

  • 1Department of Biological Sciences, Centre for Sports and Exercise Science, University of Essex, Wivenhoe Park, Colchester CO4 3SQ, UK. rbeneke@essex.ac.uk

European Journal of Applied Physiology
|March 11, 2003
PubMed
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Determining the maximal lactate steady state (MLSS) requires specific testing protocols. Shorter tests (20 min) yield different results than longer 30-min tests, impacting exercise workload assessments.

Area of Science:

  • Exercise Physiology
  • Sports Science
  • Biochemistry

Background:

  • Maximal lactate steady state (MLSS) is crucial for assessing endurance capacity.
  • Interpreting MLSS data is challenging due to varied testing methodologies.
  • Blood lactate concentration (BLC) dynamics during exercise are key to MLSS determination.

Purpose of the Study:

  • To compare three distinct methods for determining MLSS.
  • To evaluate the influence of test duration on MLSS and corresponding workload.
  • To identify optimal testing procedures for valid MLSS assessment.

Main Methods:

  • Compared three MLSS testing protocols (MLSS I, II, III) in 26 male subjects.
  • Protocols varied in duration (30 min vs. 20 min) and BLC measurement timing.

Related Experiment Videos

  • Assessed BLC and workload at steady-state during constant submaximal exercise.

    • Main Results:

    • Significant differences were found in MLSS values between the three methods (P<0.01).
    • MLSS III (20 min) resulted in a lower workload compared to MLSS I (30 min) and MLSS II (20 min) (P<0.01).
    • Testing procedures relying heavily on early BLC changes (20-25 min) may not accurately reflect MLSS.

    Conclusions:

    • Test duration significantly impacts MLSS and associated workload determination.
    • Constant-load tests of at least 30 minutes are recommended for valid MLSS results.
    • Limiting BLC increase to 1.0 mmol/L after 10 minutes aids accurate MLSS assessment.