Are the swimming velocities at the lactate and glucose thresholds similar and well-related?

This study aimed to compare the swimming velocities at lactate and glucose thresholds, as well as to analyse their relationships. Eight trained swimmers performed in front crawl a 200m steps intermittent incremental test and a lactate minimum test. Lactate and glucose concentrations were identified at rest, during the intervals and at the end of the tests to compute the lactate/velocity and glucose/ velocity curves, and asses the corresponding lactate and glucose thresholds swimming velocities. Paired Student's t-test, Cohen's d, Pearson correlation and linear regression were applied for a p < 0.05. Lactate and glucose thresholds swimming velocities obtained in intermittent incremental and lactate minimum tests were different (1.46 0.16 vs. 1.41 0.15 ms -1 and 1.42 0.17 vs. 1.37 0.17 ms -1 , respectively; p < .05), with large and moderate effect size values (respectively). However, lactate and glu-cose thresholds swimming velocities were highly related in both tests (r = .96; p < .05).