Table 2.
Validity results of used methods.
| Speed (km·h−1) | Blood lactate (mMol·L−1) | VT1 | MLSS | VT2 | MAS | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Speed: 11.5 ± 1.8 km·h−1 | Speed: 13.5 ± 1.1 km·h−1 | Speed: 15.8 ± 1.4 km·h−1 | Speed: 18.1 ± 1.3 km·h−1 | |||||||||||||||
| M ± SD | M ± SD | Student t | ICC | Bland altman | Student t | ICC | Bland altman | Student t | ICC | Bland altman | Student t | ICC | Bland altman | |||||
| p | Bias (SD) | LoA 95% | p | Bias (SD) | LoA 95% | p | Bias (SD) | LoA 95% | p | Bias (SD) | LoA 95% | |||||||
| VT1 | 11.5 ± 1.8 | 2.2 ± 0.7 | ||||||||||||||||
| MLSS | 13.5 ± 1.1 | 3.3 ± 1.1 | <0.01 | 0.91 | −2.0 (0.9) | −3.8; −0.3 | ||||||||||||
| VT2 | 15.8 ± 1.4 | 5.7 ± 1.9 | <0.01 | 0.92 | −4.3 (0.9) | −6.1; −2.6 | <0.01 | 0.94 | −2.3 (0.7) | −3.6; −1.0 | ||||||||
| MAS | 18.1 ± 1.3 | 10.6 ± 3.1 | <0.01 | 0.86 | −7.6 (2.0) | −11.6; −3.7 | <0.01 | 0.95 | −5.0 (0.6) | −6.2; −3.9 | <0.01 | 0.91 | −3.1 (1.8) | −6.7; 0.5 | ||||
| LT | 11.8 ± 1.8 | 2.3 ± 0.4 | 0.57 | 0.90 | –0.3 (1.2) | –2.7; 2.1 | <0.01 | 0.82 | 1.8 (1.3) | −0.9; 4.4 | <0.01 | 0.83 | 4.1 (1.4) | 1.4; 6.9 | <0.01 | 0.75 | 6.7(1.5) | 3.8; 9.7 |
| LT+0.5 | 12.7 ± 2.1 | 2.8 ± 0.4 | 0.03 | 0.93 | −1.3 (1.1) | −3.5; 0.9 | 0.15 | 0.82 | 0.7 (1.4) | −2.0; 3.5 | <0.01 | 0.84 | 3.0 (1.4) | 0.3; 5.8 | <0.01 | 0.76 | 5.7 (1.6) | 2.7; 8.8 |
| LT+1.0 | 13.6 ± 2.0 | 3.3 ± 0.4 | <0.01 | 0.93 | −2.2 (1.1) | −4.4; −0.1 | 0.74 | 0.84 | –0.2 (1.2) | –2.6; 2.3 | <0.01 | 0.84 | 2.1 (1.4) | −0.7; 4.9 | <0.01 | 0.77 | 4.8 (1.5) | 2.0; 7.7 |
| LT+1.5 | 14.3 ± 1.9 | 3.8 ± 0.4 | <0.01 | 0.93 | −2.8 (1.1) | −5.0; −0.7 | 0.09 | 0.85 | −0.8 (1.2) | −3.2; 1.6 | <0.01 | 0.84 | 1.5 (1.3) | −1.1; 4.1 | <0.01 | 0.78 | 4.1 (1.4) | 1.4; 7.0 |
| LT+2.0 | 14.8 ± 1.9 | 4.3 ± 0.4 | <0.01 | 0.92 | −3.4 (1.1) | −5.6; −1.3 | 0.01 | 0.85 | −1.3 (1.4) | −4.0; 1.4 | 0.07 | 0.84 | 0.9 (1.3) | −1.7; 3.5 | <0.01 | 0.78 | 3.6 (1.4) | 0.9; 6.4 |
| LT+2.5 | 15.3 ± 1.9 | 4.8 ± 0.4 | <0.01 | 0.91 | −3.9 (1.1) | −6.1; −1.8 | <0.01 | 0.85 | −1.8 (1.1) | −4.1; 0.5 | 0.37 | 0.83 | 0.4 (1.3) | −2.4; 3.2 | <0.01 | 0.78 | 3.1 (1.4) | 0.4; 5.9 |
| LT+3.0 | 15.8 ± 1.8 | 5.3 ± 0.4 | <0.01 | 0.91 | −4.3 (1.1) | −6.5; −0.3 | <0.01 | 0.85 | −2.3 (1.2) | −4.6; −0.1 | 0.99 | 0.82 | <0.1 (1.3) | –2.5; 2.6 | <0.01 | 0.78 | 2.7 (1.4) | −0.1; 5.4 |
| V-Slope | 14.6 ± 1.4 | 4.4 ± 2.1 | <0.01 | 0.76 | −3.1 (1.5) | −6.1; −0.2 | 0.01 | 0.85 | −1.1 (1.2) | −3.6; 1.4 | 0.01 | 0.73 | 1.2 (1.4) | −1.6; 4.0 | <0.01 | 0.57 | 3.9 (1.5) | 1.0; 6.8 |
| DMAX | 14.1 ± 1.6 | 3.7 ± 1.0 | <0.01 | 0.96 | −2.6 (0.8) | −4.2; −1.1 | 0.19 | 0.94 | −0.6 (0.8) | −2.1; 0.9 | <0.01 | 0.91 | 1.7 (1.0) | −0.3; 3.7 | <0.01 | 0.92 | 4.4 (0.9) | 2.6; 6.2 |
| OBLA4mM | 14.5 ± 2.1 | 4.0 ± <0.1 | <0.01 | 0.93 | −3.0 (1.1) | −5.2; −0.9 | 0.06 | 0.84 | −1.0 (1.3) | −3.6; 1.6 | 0.02 | 0.86 | 1.3 (1.4) | −0.9; 3.5 | <0.01 | 0.78 | 3.9 (1.5) | 1.0; 7.0 |
| Vpeak | 19.3 ± 1.3 | 12.0 ± 3.9 | <0.01 | 0.93 | −8.5 (2.1) | −12.7; −4.4 | <0.01 | 0.96 | −5.8 (0.6) | −7.0; −4.7 | <0.01 | 0.93 | −3.9 (2.0) | −7.9; 0.1 | 0.02 | 0.97 | −0.9 (0.5) | −1.9; 0.2 |
| MASEST | 18.4 ± 1.1 | – | <0.01 | 0.88 | −7.6 (2.0) | −11.6; −3.7 | <0.01 | 0.96 | −4.9 (0.5) | −6.0; −4.0 | <0.01 | 0.91 | −3.1 (1.9) | −6.9; 0.7 | >0.99 | 0.98 | <0.1 (0.4) | –0.9; 0.9 |
Comparison of running speeds at VT1, MLSS, VT2, and MAS against the rest of parameters.VT1, First ventilatory threshold; MLSS, Maximal lactate steady state; VT2 Secondary ventilatory threshold; MAS, Maximal aerobic speed; LT, Lactate threshold; LT+0.5,+1.0,+1.5,+2.0,+2.5,+3.0, Concentrations above lactate threshold; DMAX, Maximum distance between the slope of a polynomial and the line connecting both ends; OBLA4mMol, Onset blood lactate accumulation 4 mMol·L−1; Vpeak, Fastest velocity achieved at the end of the graded exercise testing protocol; MASEST, Theoretical MAS estimated from Vpeak. The most powerful relationships are highlighted in bold. LoA, 95% limit of agreement.