Test protocols applied to runners should reproduce the real training, outdoor race and should be able to unequivocally determine the submaximal parameters such as ventilatory threshold (VT) and respiratory compensation point (RCP). However, classical VO2max protocols are still used for athletes, mainly due to familiarity, and most of them differ in methodological characteristics, such as stage duration and increment size. Other difficulty found is the lack of reliability, which can affect the precision assessment of the athlete’s performance. The aim of this study was to verify the reproducibility of an incremental protocol for the treadmill based on metabolic concepts. Eleven amateur male runners underwent four repetitions of a protocol with 25-second stages, each increasing 0.3 km•h⎯1 in running speed while the treadmill grade remained fixed at 1%. We found no significant differences in the parameters analyzed (p>0.05), including VT, RCP and VO2max. All the results showed high within subject reproducibility (CV<9.1%). We concluded that the VO2max protocol proposed here was able to evaluate training effects on maximal and submaximal parameters, showing clear determination of the VT, RCP and VO2max.



To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.