Abstract
PURPOSE: To compare the demands of a six-day stage race using power and heart rate in men (n = 8) and women (n = 10) from North American professional cycling teams. METHODS: Power (PW) was monitored with crank or hub based power meters. Heart rate (HR) was monitored with radio telemetry. All subjects competed over the same distances and courses during a prologue (4 km), 4 circuit/road races (mean ± SD: 118 ± 23 km), and a criterium (47 km). Descriptive measurements for subjects were assessed in the laboratory within 2 weeks of the race. RESULTS: (Mean ± SD): VO2 max, power at VO2 max, and power at lactate threshold for men vs. women were 68 ± 3 vs. 54 ± 4 ml·kg−1·min−1, 416 ± 23 vs. 313 ± 27 watts and, 288 ± 11 vs. 203 ± 22 watts. For all events, HR estimates of energy expenditure (Kcals) and power (Watts) were significantly different (p < 0.05) from those determined via actual PW.Table: No Caption AvailableSignificant differences (p<0.05) were found between power and heart rate estimates of percent time spent below (BE), at (AT), and above (AB) the lactate threshold except as noted in bold.Table: No Caption AvailableCONCLUSION: HR and PW provide different descriptiont of competitive cycling demands. Supported by Graber Products, Inc.
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