TABLE 4.
The heart rate (HR) spectrum during cycle commuting in field as well as the measured and estimated oxygen uptake (V̇O2) at these positions for males.
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Values based on the mean HR in size ordered segments of quintiles (Q) of all single HR values during cycle commuting in field |
Values based on the mean HR in field | |||||
| Males (n = 10) | Q1 | Q2 | Q3 | Q4 | Q5 | Mean |
| HR (beats⋅min–1) | 116 ± 13 | 132 ± 14 | 139 ± 13 | 144 ± 13 | 151 ± 12 | 136 ± 13 |
| %HRmax | 66.7 ± 7.5 | 75.7 ± 8.7 | 79.7 ± 8.7 | 82.5 ± 8.4 | 86.8 ± 8.2 | 78.3 ± 8.2 |
| %HRR | 49.5 ± 11.3 | 63.3 ± 13.0 | 69.3 ± 13.0 | 73.5 ± 12.6 | 80.0 ± 12.3 | 67.2 ± 12.2 |
| Measured V̇O2 (L⋅min–1) | 1.84 ± 0.41 | 2.45 ± 0.56 | 2.70 ± 0.61 | 2.89 ± 0.62 | 3.11 ± 0.67 | 2.60 ± 0.55 |
| %V̇O2max | 46.0 ± 10.2 | 60.8 ± 11.0 | 67.1 ± 11.3 | 71.7 ± 11.3 | 77.2 ± 12.1 | 64.7 ± 10.7 |
| Estimated V̇O2 with model 1 (L⋅min–1)* | 2.02 ± 0.50 | 2.52 ± 0.67 | 2.74 ± 0.70 | 2.89 ± 0.70 | 3.13 ± 0.71 | 2.66 ± 0.65 |
| Absolute difference model 1 (L⋅min–1) | 0.18 ± 0.37 (−0.09–0.44) | 0.07 ± 0.32 (−0.15–0.30) | 0.04 ± 0.25 (−0.14–0.22) | 0.00 ± 0.24 (−0.17–0.18) | 0.02 ± 0.24 (−0.16–0.19) | 0.06 ± 0.27 (−0.13–0.25) |
| P-values | 0.164 | 0.479 | 0.632 | 0.973 | 0.837 | 0.495 |
| Relative difference model 1 (%) | 11.2 ± 20.2 (−3.2–25.7) | 3.4 ± 13.1 (−5.9–12.8) | 1.6 ± 9.3 (−5.1–8.2) | 0.2 ± 8.5 (−5.8–6.3) | 0.9 ± 8.3 (−5.1–6.8) | 2.5 ± 10.4 (−4.9–9.9) |
| P-values | 0.112 | 0.428 | 0.604 | 0.927 | 0.755 | 0.464 |
| Estimated V̇O2 with model 2 (L⋅min–1)** | 2.04 ± 0.55 | 2.59 ± 0.77 | 2.82 ± 0.81 | 2.98 ± 0.80 | 3.23 ± 0.82 | 2.73 ± 0.74 |
| Absolute difference model 2 (L⋅min–1) | 0.20 ± 0.40 (−0.09–0.48) | 0.14 ± 0.38 (−0.13–0.41) | 0.12 ± 0.33 (−0.12–0.35) | 0.09 ± 0.32 (−0.14–0.32) | 0.12 ± 0.30 (−0.09–0.34) | 0.13 ± 0.33 (−0.10–0.37) |
| P-values | 0.150 | 0.277 | 0.280 | 0.386 | 0.230 | 0.235 |
| Relative difference model 2 (%) | 11.8 ± 20.5 (−2.9–26.5) | 5.5 ± 14.3 (−4.7–15.8) | 4.0 ± 10.7 (−3.6–11.7) | 3.0 ± 10.0 (−4.2–10.1) | 3.9 ± 9.3 (−2.7–10.6) | 4.8 ± 11.6 (−3.5–13.1) |
| P-values | 0.102 | 0.251 | 0.263 | 0.373 | 0.211 | 0.218 |
Values are presented as mean ± SD and (95% CI). *Calculated from the HR-V̇O2 relationship in the laboratory, including three submaximal work rates of ergometer cycling. **Calculated from the HR-V̇O2 relationship in the laboratory, including three submaximal work rates and one maximal work rate of ergometer cycling.