Table 3.
Validity results, showing the mean ± SD values of physiological variables measured by the three metabolic systems during parallel data collection at rest, moderate, and vigorous cycle exercise
| Activity | Douglas bag | MetaMax 3B | Oxycon Pro | |
|---|---|---|---|---|
| V E (BTPS, L min−1) | Rest | 8.72 ± 1.03 | 7.93 ± 1.73 | 7.72 ± 1.82 |
| Moderate | 29.89 ± 8.19 | 30.61 ± 9.78^ | 28.73 ± 8.31 | |
| Vigorous | 66.00 ± 20.52 | 66.25 ± 19.16 | 62.54 ± 18.26 | |
| VO2 (STPD, L min−1) | Rest | 0.27 ± 0.04 | 0.30 ± 0.08^ | 0.25 ± 0.06 |
| Moderate | 1.12 ± 0.33 | 1.24 ± 0.41*^ | 1.12 ± 0.36 | |
| Vigorous | 2.32 ± 0.46 | 2.59 ± 0.52*^ | 2.37 ± 0.44 | |
| VCO2 (STPD, L min−1) | Rest | 0.22 ± 0.04 | 0.26 ± 0.07^ | 0.20 ± 0.06 |
| Moderate | 1.03 ± 0.31 | 1.17 ± 0.40*^ | 1.01 ± 0.33 | |
| Vigorous | 2.25 ± 0.52 | 2.64 ± 0.66*^ | 2.17 ± 0.43 |
* Significantly different to Douglas bag measurements (ANOVA, p < 0.05)
^ Significantly different to Oxycon Pro measurements (ANOVA, p < 0.05)