TABLE 5.
The heart rate (HR) spectrum during cycle commuting in field as well as the measured and estimated oxygen uptake (V̇O2) at these positions for females.
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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 | |||||
| Females (n = 10) | Q1 | Q2 | Q3 | Q4 | Q5 | Mean |
| HR (beats⋅min–1) | 118 ± 10 | 132 ± 7 | 139 ± 6 | 145 ± 6 | 153 ± 7 | 138 ± 6 |
| %HRmax | 67.2 ± 5.6 | 75.4 ± 4.4 | 79.1 ± 3.9 | 82.4 ± 3.6 | 87.3 ± 3.4 | 78.4 ± 3.9 |
| %HRR | 50.3 ± 7.1 | 62.8 ± 5.4 | 68.5 ± 4.7 | 73.4 ± 4.5 | 80.8 ± 4.6 | 67.3 ± 4.7 |
| Measured V̇O2 (L⋅min–1) | 1.15 ± 0.25 | 1.57 ± 0.21 | 1.77 ± 0.21 | 1.91 ± 0.21 | 2.14 ± 0.21 | 1.71 ± 0.20 |
| %V̇O2max | 43.7 ± 8.6 | 59.8 ± 10.6 | 67.5 ± 11.2 | 73.2 ± 12.8 | 81.6 ± 10.1 | 65.4 ± 10.0 |
| Estimated V̇O2 with model 1 (L⋅min–1)* | 1.32 ± 0.25 | 1.64 ± 0.22 | 1.79 ± 0.22 | 1.92 ± 0.23 | 2.11 ± 0.24 | 1.76 ± 0.22 |
| Absolute difference model 1 (L⋅min–1) | 0.17 ± 0.24 (−0.00–0.34) | 0.08 ± 0.17 (−0.04–0.20) | 0.02 ± 0.16 (−0.09–0.14) | 0.01 ± 0.19 (−0.13–0.14) | −0.03 ± 0.19 (−0.16–0.11) | 0.05 ± 0.17 (−0.07–0.17) |
| P-values | 0.053 | 0.174 | 0.662 | 0.903 | 0.640 | 0.390 |
| Relative difference model 1 (%) | 17.0 ± 21.5 (1.7–32.4) | 5.6 ± 11.1 (−2.3–13.5) | 1.7 ± 9.0 (−4.7–8.1) | 0.8 ± 10.1 (−6.5–8.0) | −1.2 ± 8.8 (−7.5–5.2) | 3.2 ± 10.4 (−4.2–10.7) |
| P-values | 0.033 | 0.146 | 0.560 | 0.815 | 0.685 | 0.348 |
| Estimated V̇O2 with model 2 (L⋅min–1)** | 1.31 ± 0.25 | 1.64 ± 0.21 | 1.79 ± 0.19 | 1.92 ± 0.19 | 2.12 ± 0.21 | 1.76 ± 0.20 |
| Absolute difference model 2 (L⋅min–1) | 0.16 ± 0.24 (−0.02–0.33) | 0.07 ± 0.18 (−0.06–0.20) | 0.02 ± 0.18 (−0.11–0.15) | 0.01 ± 0.22 (−0.15–0.16) | −0.02 ± 0.20 (−0.17–0.12) | 0.05 ± 0.19 (−0.09–0.18) |
| P-values | 0.072 | 0.233 | 0.726 | 0.912 | 0.724 | 0.454 |
| Relative difference model 2 (%) | 15.8 ± 21.7 (0.3–31.4) | 5.5 ± 12.2 (−3.3–14.2) | 1.9 ± 10.6 (−5.7–9.5) | 1.1 ± 11.9 (−7.3–9.6) | −0.7 ± 9.8 (−7.7–6.3) | 3.4 ± 11.5 (−4.9–11.6) |
| P-values | 0.047 | 0.190 | 0.586 | 0.768 | 0.823 | 0.381 |
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.