Purpose: The aim of this study was to determine the reliability and validity of several submaximal variables that can be easily obtained by monitoring cyclists` performances. Methods: Eighteen professional cyclists participated in this study. In a first part (n=15) the test-retest reliability of heart rate (HR) and rating of perceived exertion (RPE) during a progressive maximal test was measured. Derived submaximal variables based on HR, RPE, and power output (PO) responses were analyzed. In a second part (n=7) the pattern of the submaximal variables according to cyclists` training status was analyzed. Cyclists were assessed 3 times during the season: at the beginning of the season, before the Vuelta a España, and the day after this Grand Tour. Results: Part 1: No significant differences in maximal and submaximal variables between test-retest were found. Excellent ICCs (0.81-0.98) were obtained in all variables. Part 2: The HR and RPE showed a rightward shift from early to peak season. In addition, RPE showed a left shift after the Vuelta a España. Submaximal variables based on RPE had the best relationship with both performance and changes in performance. Conclusion: The present study showed the reliability of different maximal and submaximal variables used to assess cyclists` performances. Submaximal variables based on RPE seem to be the best to monitor changes in training status over a season.
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