Table 4. Cardiopulmonary exercise testing (CPET) characteristics for cyclists.
| Variable (unit) | Derivation group n=656 | Testing group n=219 | Validation group n=219 | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Mean | CI | SD | Mean | CI | SD | Mean | CI | SD | |
| rVO2AT (mL·min–1·kg–1) | 33.0 | 32.5–33.4 | 5.84 | 33.2 | 32.4–33.9 | 5.68 | 33.7 | 32.9–34.5 | 5.89 |
| RERAT | 0.87 | 0.87–0.87 | 0.04 | 0.87 | 0.87–0.88 | 0.04 | 0.87 | 0.87–0.88 | 0.04 |
| HRAT (beats·min–1) | 142.2 | 141.3–143.1 | 11.7 | 140.7 | 139.1–142.3 | 11.8 | 141.2 | 139.7–142.6 | 10.8 |
| VEAT (L·min–1) | 64.9 | 64.0–65.7 | 11.0 | 65.1 | 63.7–66.5 | 10.6 | 67.4 | 66.0–68.9 | 11.2 |
| rPOWAT (W·kg–1) | 2.28 | 2.24–2.32 | 0.48 | 2.27 | 2.21–2.34 | 0.48 | 2.33 | 2.27–2.39 | 0.46 |
| LAAT (mmol·L–1) | 1.86 | 1.82–1.90 | 0.51 | 1.84 | 1.77–1.90 | 0.50 | 1.80 | 1.74–1.87 | 0.51 |
| rVO2RCP (mL·min–1·kg–1) | 44.0 | 43.5–44.6 | 7.38 | 44.4 | 43.4–45.4 | 7.32 | 44.9 | 43.8–45.9 | 7.63 |
| RERRCP | 1.01 | 1.01–1.01 | 0.04 | 1.01 | 1.01–1.02 | 0.04 | 1.01 | 1.01–1.02 | 0.04 |
| HRRCP (beats·min–1) | 168.8 | 168.0–169.7 | 10.5 | 167.7 | 166.2–169.2 | 11.3 | 168.4 | 167.1–169.6 | 9.11 |
| VERCP (L·min–1) | 106.2 | 104.8–107.6 | 17.7 | 107.6 | 105.3–109.8 | 16.8 | 110.4 | 107.9–112.9 | 18.7 |
| rPOWRCP (W·kg–1) | 3.34 | 3.29–3.38 | 0.63 | 3.33 | 3.25–3.42 | 0.63 | 3.40 | 3.32–3.48 | 0.61 |
| LARCP (mmol·L–1) | 4.54 | 4.47–4.61 | 0.97 | 4.61 | 4.48–4.75 | 1.04 | 4.47 | 4.34–4.61 | 1.03 |
| rVO2MAX (mL·min–1·kg–1) | 51.7 | 51.1–52.4 | 7.99 | 52.0 | 50.9–53.1 | 8.01 | 52.3 | 51.2–53.4 | 8.08 |
CI, 95% confidence interval; SD, standard deviation; rVO2AT, oxygen uptake at anaerobic threshold relative to body mass; RERAT, respiratory exchange ratio at anaerobic threshold; HRAT, heart rate at anaerobic threshold; VEAT, pulmonary ventilation at anaerobic threshold; rPOWAT, power at anaerobic threshold relative to body mass; LAAT, blood lactate concentration at anaerobic threshold; rVO2RCP, oxygen uptake at respiratory compensation point relative to body mass; RERRCP, respiratory exchange ratio at respiratory compensation point; HRRCP, heart rate at respiratory compensation point; VERCP, pulmonary ventilation at respiratory compensation point; LARCP, blood lactate concentration at respiratory compensation point; rPOWRCP, power at respiratory compensation point relative to body mass; rVO2max, maximal oxygen uptake relative to body mass.