Fig 1.
Curve of the reverse lactate threshold test considering the blood lactate concentration plotted against power from experienced individual (subject 1 from experienced group).
The second order polynomial adjustment was considered for the anaerobic threshold determination (AnTRLT) and blood lactate concentration at anaerobic threshold ([Lac]AnT-RLT).
Fig 2.
Curve of the reverse lactate threshold test considering the heart rate plotted against power from experienced individual (subject 1 from experienced group).
The second order polynomial adjustment was considered for the anaerobic threshold determination (AnTRLT-HR) and heart rate at anaerobic threshold (HRAnT-RLT).
Fig 3.
Bland-Altman analysis performed for anaerobic threshold intensity determined on the reverse lactate threshold test and incremental protocol on non-experienced individuals.
a) Agreement between anaerobic threshold intensity determined on incremental protocol by the bissegmentation method (AnTInc-Biss) and reverse lactate threshold test (AnTRLT); b) Agreement between anaerobic threshold intensity determined on incremental protocol by fixed blood lactate concentration at 4 mmol.L-1 (AnTOBLA4) and AnTRLT; c) Agreement between anaerobic threshold intensity determined on incremental protocol by fixed blood lactate concentration at 3 mmol.L-1 (AnTOBLA3) and AnTRLT; d) Agreement between anaerobic threshold intensity determined on incremental protocol by maximal deviation method using the exponential adjustment (AnTDmaxExp) and AnTRLT; e) Agreement between anaerobic threshold intensity determined on incremental protocol by maximal deviation method using the second order polynomial adjustment (AnTDmaxPoli) and AnTRLT.
Fig 4.
Bland-Altman analysis performed for anaerobic threshold intensity determined on the reverse lactate threshold test and incremental protocol on experienced individuals.
a) Agreement between anaerobic threshold intensity determined on incremental protocol by the bissegmentation method (AnTInc-Biss) and reverse lactate threshold test (AnTRLT); b) Agreement between anaerobic threshold intensity determined on incremental protocol by fixed blood lactate concentration at 4 mmol.L-1 (AnTOBLA4) and AnTRLT; c) Agreement between anaerobic threshold intensity determined on incremental protocol by fixed blood lactate concentration at 3 mmol.L-1 (AnTOBLA3) and AnTRLT; d) Agreement between anaerobic threshold intensity determined on incremental protocol by maximal deviation method using the exponential adjustment (AnTDmaxExp) and AnTRLT; e) Agreement between anaerobic threshold intensity determined on incremental protocol by maximal deviation method using the second order polynomial adjustment (AnTDmaxPoli) and AnTRLT.
Table 1.
Comparison between the anaerobic threshold intensity from the incremental protocol analyzed by different mathematical models and the reverse lactate threshold test obtained by subjects without (non-experienced) or with (experienced) experience with cycling exercise.
Table 2.
Comparison between the blood lactate concentration at the anaerobic threshold intensity from the incremental protocol analyzed by different mathematical models and the reverse lactate threshold test obtained by subjects without (non-experienced) or with (experienced) experience with cycling exercise.
Table 3.
Comparison between the heart rate at the anaerobic threshold intensity from the incremental protocol analyzed by different mathematical models and the reverse lactate threshold test obtained by subjects without (non-experienced) or with (experienced) experience with cycling exercise.
Table 4.
Maximal heart rate predicted (HRmax-predic) and registered (HRmax-calc) during the reverse lactate threshold test and incremental protocol, as well as the percent of maximal heart rate at the anaerobic threshold intensities considering the registered (%HRmax-calc) and predicted (%HRmax-predic) maximal heart rate.
Fig 5.
a) Agreement performed by Bland-Altman analysis for anaerobic threshold intensity determined on the reverse lactate threshold test by blood lactate concentration (AnTRLT) and heart rate (AnTRLT-HR) for non-experienced individuals; b) Agreement performed by Bland-Altman analysis AnTRLT and AnTRLT-HR for experienced individuals; c) Agreement performed by Bland-Altman analysis for coefficient of determination on the reverse lactate threshold test by blood lactate concentration (AnTRLT R2) and heart rate (AnTRLT-HR R2) for non-experienced individuals; d) Agreement performed by Bland-Altman analysis AnTRLT R2 and AnTRLT-HR R2 for experienced individuals.
Table 5.
Comparison between the results from the reverse lactate threshold test analyzed in terms of blood lactate concentration and heart rate obtained by subjects without (non-experienced) or with (experienced) experience with cycling exercise.
Fig 6.
a) Curve of the reverse lactate threshold test from subject 5 (Experienced group) considering the blood lactate concentration plotted against power. The second order polynomial adjustment was considered for the anaerobic threshold determination (AnTRLT); b) Curve of the reverse lactate threshold test from subject 5 (Experienced group) considering the heart rate plotted against power. The second order polynomial adjustment was considered for the anaerobic threshold determination (AnTRLT-HR).