Table 3. The clustering of features based on a network.
| Group 1 | Group 2 | Group 3 |
|---|---|---|
| max time | time to reach VAT | max VE/VO2 |
| max VT | time from the VAT to the end | max VE/VCO2 |
| max VE (PP,MP) | relative time of VAT | VO2-1 at VAT |
| max VO2 | ratio of VAT (VO2) to the max time | VCO2-1 at VAT |
| max VCO2 | ratio of VAT to the max value of RER(VO2) | slope VCO2 versus VE (PP) |
| max VO2 [ml/min/kg] (PP,MP) | Slope A | slope VO2 versus VE |
| max RR | Slope B | VO2 at 1st min |
| VO2-2 at VAT | area A of graph VO2 as a function of VCO2 | VO2 at 2nd min |
| VCO2-2 at VAT | Time at VAT | VO2 at 3rd min |
| area B of graph VO2 as a function of VCO2 | RF at VAT | predicted VO2 at VAT/the real VO2 at VAT |
| slope at 1st min increase VO2 (MP) | VE at VAT | max RF (PP) |
| slope at 2nd min increase VO2 | VCO2 [ml/min] at VAT | |
| slope at 3rd min increase VO2 | VO2[ml/min/kg] at VAT |
|
| max slope time max speed (PP, MP) | RR at VAT | |
| VEmax/slope*speed | VSLOPE | |
| VO2max/slope*speed (PP) | ||
| predicted VO2 | ||
| max slope * max speed * max time |