Predicting Trail-Running Performance With Laboratory Exercise Tests and Field-Based Results
| Autor: | Hans-Christian Heitkamp, Tanja I. Janssen, Volker Scheer, Solveig Vieluf |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Computer science
business.industry Lactate threshold VO2 max Physical Therapy Sports Therapy and Rehabilitation 030229 sport sciences 030204 cardiovascular system & hematology Machine learning computer.software_genre 03 medical and health sciences 0302 clinical medicine Performance prediction Orthopedics and Sports Medicine Field based Artificial intelligence business computer |
| Zdroj: | International Journal of Sports Physiology and Performance. 14:130-133 |
| ISSN: | 1555-0273 1555-0265 |
| DOI: | 10.1123/ijspp.2018-0390 |
| Popis: | Purpose: Trail running is a complex sport, and performance prediction is challenging. The aim was to evaluate 3 standard laboratory exercise tests in trail runners and correlate measurements to the race time of a trail competition evaluating its predictive power. Methods: Nine competitive male trail runners (mean age: 31 [5.8] y) completed 3 different laboratory exercise tests (step, ramp, and trail tests) for determination of maximal oxygen uptake (VO2max), vVO2max, ventilatory (VT) and lactate thresholds (LT), mechanical power output, and running economy (RE), followed by a 31-km trail race. Runners had previously participated in the same race (previous year) and finished in the top 2%. Finishing times (dependent value) were tested in multiple-regression analysis with different independent value combinations. Results: Linear-regression analysis revealed that variables measured during step and ramp tests significantly predicted performance. Step-test variables (speed at individual anaerobic threshold 16.4 [1.7] km/h and RE 12 km/h in %VO2max 65.6% [5.4%]) showed the highest performance prediction (R2 = .651, F2,6 = 5.60, P = .043), followed by the ramp test (vVO2max 20.3 [1.3] km/h; R2 = .477, F1,7 = 6.39, P = .04) and trail test (maximal power 3.9 [0.5] W/kg, VO2max 63.0 [4.8] mL O2·kg−1·min−1, vVT1 11.9 [0.7] km/h; R2 = .68, F3,5 = 3.52, P = .11). Adding race time from the preceding year to the step test improved the predictive power of the model (R2 = .988, F3,5 = 66.51, P Conclusions: The graded exercise test (VO2max, individual anaerobic threshold, and RE) most accurately predicted a 31.1-km trail-running performance. Combining submaximal intensities (individual anaerobic threshold and RE) with the previous year’s race time of that specific event increased the predictive power of the model to 99%. |
| Databáze: | OpenAIRE |
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