Validity of a novel device for indoor analysis of cyclists' drag area.

Findings suggest that, notwithstanding Notio Aerostick is valid if we compare CdA values with respect to VE, since the direction of their between-positions CdA changes differs, the results of their aerodynamic evaluation could lead us to recommend different final setups. We need studies that evaluate different units of the Notio Aerostick device as well as the reliability and precision of each sensor that includes Notio Aerostick.HighlightsThe CdA calculated by the Notio Aerostick and VE, a mathematical model previously validated, can be interchangeable, however the final position recommended by each method may be different, since the changes in the following position are given by the changes of the CdA in the previous position.None of the three methods allowed elite cyclists to measure statistically significant differences between the proposed setups.Although the CdA differences between positions were not significant, they can be decisive in the final result of a time trial competition.