TABLE 5.
Agreement results. Comparison of HR (bpm), relative VO2 (mL·kg-1·min-1), and PO (W) at HRVT2 with the different used methods.
| HRVT2 | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Mean differences | r Pearson | ICC | 95% CI | Bland Altman | ||||||
| p-value | Power | r value | p-value | Power | Bias (bpm) | SD (bpm) | ||||
| HR | VT2 | .017 | .755 | .692 | .004 | .935 | .656 | .27–.86 | 7.5 | 10.1 |
| OBLA | .006 | .891 | .665 | .007 | .913 | .632 | .23–.85 | 9.2 | 10.4 | |
| Bsln+1.5 | <.001 | 1.000 | .681 | .005 | .929 | .634 | .24–.85 | 21.1 | 10.8 | |
| VO 2 rel | VT2 | .450 | .112 | .881 | <.001 | .998 | .884 | .70–.96 | 0.8 | 4.1 |
| OBLA | .226 | .219 | .888 | <.001 | .999 | .888 | .71–.96 | 1.3 | 4.0 | |
| Bsln+1.5 | <.001 | .993 | .872 | <.001 | .997 | .872 | .67–.95 | 5.1 | 4.2 | |
| PO | VT2 | .367 | .140 | .919 | <.001 | 1.000 | .917 | .78–.97 | 5.3 | 21.9 |
| OBLA | .026 | .637 | .932 | <.001 | 1.000 | .932 | .82–.98 | 13.1 | 20.5 | |
| Bsln+1.5 | <.001 | 1.000 | .882 | <.001 | 1.000 | .917 | .78–.97 | 49.9 | 21.7 | |
95% CI, ICC, confidence interval; HR; heart rate; VO2rel, relative oxygen uptake; PO, power output; VO2rel, relative oxygen uptake; HRVT2, second heart rate variability threshold; VT2, second ventilatory threshold; OBLA, onset of blood lactate accumulation at 4 mmol l-1; Bsln+1.5, lactate baseline +1.5 mmol·L-1.