The varied track structure leads to a high workload variability, with numerous bursts of high power output (PO Inoue et al., 2012 Macdermid and Stannard, 2012 Granier et al., 2018 Hays et al., 2018).
Number and duration of bouts did not change significantly between laps.Ĭonclusion: The highly variable pacing pattern in XCO implies the need for rapid changes in metabolic power output, as a result of numerous separate short-lived >CP actions which decrease in magnitude in later laps, but with little lap-to-lap variation in number and duration.Ĭross-country Olympic (XCO) mountain biking races are off-road cycling events characterized by high-intensity mass-starts and undulating terrain. For single >CP bouts, mean magnitude and mean W' expended decreased by 25 ± 8% and 38 ± 15% from the first to the last lap, respectively. From the first to last lap, time >CP and accumulated W' per lap decreased with 9 ± 6% and 45 ± 17%, respectively. 40 ± 8% of race time was spent with PO > CP, and the mean duration and magnitude of the bouts >CP was ~8 s and ~120% of CP. Results: Mean PO over the race duration (96 ± 7 min) corresponded to 76 ± 9% of CP and 63 ± 4% of MAP. On two laboratory tests using their own bikes and power meters, CP and work capacity above CP ( W') were calculated using three time trials of 12, 7, and 3 min, while MAP was established based on a 3-step submaximal test and the maximal oxygen uptake from the 7-min time trial. Power output (PO) during the race was measured with the cyclists’ personal power meters. The races were 19 km and 23 km and contained five (female) and six (male) laps, respectively. Methods: Five male and two female national competitive XCO cyclists completed a UCI Cat. Objective: To examine the power profiles and pacing patterns in relation to critical power (CP) and maximal aerobic power (MAP) output during a cross-country Olympic (XCO) mountain bike race. Department of Physical Performance, Norwegian School of Sports Sciences, Oslo, Norway.Steffan Næss, Ove Sollie, Øyvind Nøstdahl Gløersen and Thomas Losnegard *
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