Chronobiological Effects on Mountain Biking Performance
Abstract
:1. Introduction
2. Materials and Methods
2.1. Sample
2.2. Study Design
2.3. Procedures
2.3.1. Anthropometric and Body Composition Assessment
2.3.2. Maximal Incremental Test
2.3.3. Time Trial
2.4. Data Analysis
3. Results
4. Discussion
5. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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Variables | VO2max | 1st Ventilatory Threshold | 2nd Ventilatory Threshold | ||||||
---|---|---|---|---|---|---|---|---|---|
Mean ± SD | Max | Min | Mean ± SD | Max | Min | Mean ± SD | Max | Min | |
Mean power (W) | 324.9 ± 20.16 | 353 | 303 | 178 ± 20.41 | 203 | 153 | 259.3 ± 25 | 303 | 203 |
Relative mean power (W/kg) | 4.65 ± 0.36 | 5.37 | 3.79 | 2.55 ± 0.37 | 3.17 | 1.91 | 3.72 ± 0.46 | 4.43 | 2.81 |
Heart rate (bpm) | 172 ± 9 | 188 | 159 | 133 ± 12 | 154 | 119 | 156 ± 12 | 175 | 137 |
VO2max (mL/min) | 3658.6 ± 213.3 | 4108 | 3331 | 2345.9 ± 193.6 | 2693 | 1999 | 3119.6 ± 172.4 | 3383 | 2687 |
VO2max (mL/kg/min) | 52.3 ± 3.9 | 59.3 | 43.2 | 33.6 ± 3.9 | 40.6 | 27.3 | 44.7 ± 4.2 | 51.3 | 38.1 |
QR | 1.16 ± 0.07 | 1.3 | 1.08 | 0.94 ± 0.03 | 1.06 | 0.9 | 1.03 ± 0.05 | 1.12 | 0.94 |
Morning | Afternoon | ||||||
---|---|---|---|---|---|---|---|
Variables | Mean ± SD | Minimum | Maximum | Mean ± SD | Minimum | Maximum | p |
Starting time | 08:35:03 ± 00:29:52 | 07:20:43 | 09:39:55 | 16:54:21 ± 00:50:27 | 14:38:57 | 18:10:29 | --- |
Temperature (°C) | 26.67 ± 2.02 | 22 | 30 | 33.33 ± 3.75 | 23 | 38 | <0.001 ** |
Lactate initial (mmol/L) | 3.51 ± 1.51 | 1.7 | 7 | 3.47 ± 1.78 | 1.6 | 8.4 | 0.921 |
Mean heart rate (bpm) | 170 ± 9 | 160 | 188 | 171 ± 9 | 155 | 187 | 0.510 |
Maximal heart rate (bpm) | 179 ± 9 | 168 | 195 | 179 ± 9 | 164 | 194 | 0.921 |
Mean power (W) | 278.56 ± 35.61 | 231 | 356 | 275.25 ± 31.94 | 239 | 359 | 0.303 |
Relative Mean power (W/kg) | 3.98 ± 0.46 | 3.30 | 4.67 | 3.93 ± 0.42 | 3.19 | 4.71 | 0.625 |
Maximal power (W) | 767.19 ± 134.59 | 593 | 1024 | 736.00 ± 101.63 | 578 | 911 | 0.761 |
Stroke rate (Cycles/min) | 85.06 ± 7.58 | 70 | 95 | 82.63 ± 7.41 | 66 | 94 | 0.044 ★ |
Mean Power per Cycle (W/Cycle/min) | 3.3 ± 0.503 | 2.62 | 4.51 | 3.35 ± 0.434 | 2.74 | 4.49 | 0.429 |
Relative Mean power per cycle (W/kg/Cycle/min) | 0.047 ± 0.007 | 0.033 | 0.059 | 0.047 ± 0.007 | 0.041 | 0.061 | 0.430 |
Final lactate concentration (mmol/L) | 12.82 ± 4.46 | 5.8 | 21.2 | 12.90 ± 6.11 | 3.6 | 23 | 0.718 |
Variables | Correlation (Pearson) |
---|---|
Mean heart rate (HR) | 0.871 ** |
Maximum heart rate (HRmax) | 0.845 ** |
Mean external mechanical power (PO) | 0.938 ** |
Relative mean external mechanical power (PO/Body mass) | 0.933 ** |
Stroke rate | 0.825 ** |
Mean Power per Cycle | 0.801 ** |
Relative Mean power per cycle | 0.884 ** |
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Silveira, A.; Alves, F.; Teixeira, A.M.; Rama, L. Chronobiological Effects on Mountain Biking Performance. Int. J. Environ. Res. Public Health 2020, 17, 6458. https://doi.org/10.3390/ijerph17186458
Silveira A, Alves F, Teixeira AM, Rama L. Chronobiological Effects on Mountain Biking Performance. International Journal of Environmental Research and Public Health. 2020; 17(18):6458. https://doi.org/10.3390/ijerph17186458
Chicago/Turabian StyleSilveira, António, Francisco Alves, Ana M. Teixeira, and Luís Rama. 2020. "Chronobiological Effects on Mountain Biking Performance" International Journal of Environmental Research and Public Health 17, no. 18: 6458. https://doi.org/10.3390/ijerph17186458