Table 3. Cardiopulmonary exercise testing (CPET) characteristics for runners.
| Variable (unit) | Derivation group n=1998 | Testing group n=666 | Validation group n=666 | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Mean | CI | SD | Mean | CI | SD | Mean | CI | SD | |
| rVO2AT (mL·min–1·kg–1) | 38.4 | 38.1–38.8 | 5.01 | 38.5 | 38.3–38.7 | 4.88 | 38.1 | 37.7–38.5 | 5.16 |
| RERAT | 0.87 | 0.86–0.87 | 0.04 | 0.87 | 0.86–0.87 | 0.04 | 0.87 | 0.86–0.87 | 0.04 |
| HRAT (beats·min–1) | 151.5 | 150.8–152.3 | 10.3 | 151.0 | 150.6–151.5 | 10.8 | 152.0 | 151.2–152.8 | 10.8 |
| VEAT (L·min–1) | 79.1 | 78.1–80.0 | 12.2 | 78.3 | 77.8–78.9 | 12.0 | 77.2 | 76.3–78.2 | 12.0 |
| SPEEDAT (km·h–1) | 11.0 | 10.9–11.1 | 1.45 | 11.0 | 11.0–11.1 | 1.36 | 10.9 | 10.8–11.0 | 1.42 |
| LAAT (mmol·L–1) | 2.08 | 2.02–2.14 | 0.63 | 1.80 | 1.76–1.83 | 0.62 | 2.35 | 2.27–2.42 | 0.72 |
| rVO2RCP (mL·min–1·kg–1) | 47.5 | 47.0–48.0 | 5.88 | 47.7 | 47.4–48.0 | 6.15 | 47.3 | 46.8–47.8 | 6.16 |
| RERRCP | 1.00 | 1.00–1.00 | 0.04 | 1.00 | 1.00–1.00 | 0.04 | 1.00 | 1.00–1.00 | 0.03 |
| HRRCP (beats·min–1) | 173.4 | 172.7–174.1 | 9.21 | 173.2 | 172.8–173.6 | 9.30 | 174.3 | 173.5–175.0 | 9.50 |
| VERCP (L·min–1) | 114.7 | 113.5–116.0 | 15.9 | 113.9 | 113.1–114.6 | 16.7 | 112.7 | 111.4–114.0 | 16.2 |
| SPEEDRCP (km·h–1) | 14.0 | 13.9–14.1 | 1.77 | 14.1 | 14.0–14.1 | 1.70 | 13.9 | 13.8–14.1 | 1.75 |
| LARCP (mmol·L–1) | 4.72 | 4.63–4.82 | 1.04 | 4.40 | 4.34–4.45 | 1.04 | 4.81 | 4.69–4.93 | 1.14 |
| rVO2max (mL·min–1·kg–1) | 53.8 | 53.3–54.3 | 6.67 | 54.3 | 54.0–54.6 | 6.95 | 53.8 | 53.3–54.3 | 7.09 |
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; SPEEDAT, velocity at anaerobic threshold; 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; SPEEDRCP, velocity at respiratory compensation point; LARCP, blood lactate concentration at respiratory compensation point; rVO2max, maximal oxygen uptake relative to body mass.