摘要：Wyatt F, Russell K, Munoz N. A Comparison of Heart RateMeasures between Fit Cohorts of Cyclists. JEPonline 2018;21(3):71-78. The purpose of this study was to assess heart rate variability,slope of heart rate response, and heart rate threshold betweencycling groups of differing fitness status. Male and female cyclists(N=115) were placed into two groups, competitive and recreationalcyclists. Each subject performed a maximal test to exhaustion on thecycle ergometer. During this time, oxygen consumption (VO2),carbon dioxide production (VCO2) in L·min-1and mL·kg-1·min-1, andheart rate (beats·min-1) were determined. Based on maximal oxygenconsumption (VO2 max), the competitive cyclists were placed inquartiles with 1 being the least fit and quartile 4 being the most fit.These quartiles were compared between groups, and to recreationalcyclists considered “average fit”. A trend line of best fit was assignedto each phase of heart rate response. Thresholds of noted heart ratechange were determined for comparisons between the groups.Additionally, heart rate variation was determined through heart ratechanges every 20 sec throughout the test. From the assessment ofheart rate slope, variability and thresholds, differences were seenprimarily between the fit quartiles and the recreational group.Threshold occurrences were similar across groups. Heart rates werehigher at threshold with the low fit group as compared to lowerthreshold in the fit group. However, while heart rate slope was notdifferent between quartiles, it was significantly steeper in therecreational group. In conclusion, in comparing groups within a veryfit category and those within a fit, recreational classification, heartrate response measured through various means is notable.
