Abstract

RODRIGUES, Sérgio Tosi; SCHIAVON, Renato  and  MACEGOZA, Juliane. Type of trajectory does not affect the visual control of braking in cyclists. Rev. bras. educ. fís. esporte [online]. 2012, vol.26, n.3, pp. 473-483. ISSN 1807-5509.  http://dx.doi.org/10.1590/S1807-55092012000300013.

Braking visual control was studied in recreational cyclists through the manipulation of bicycle's velocity at braking initiation (low, medium, and high) and approaching trajectory (straight and curved) with respect to a stationary obstacle. The hypothesis was that the type of trajectory, exclusively or interacting with initial velocity, would affect time to collision visual information (tau margin) and its first derivative in time (tau-dot), respectively, in the onset and during braking. The results revealed that velocity affected significantly tau margin while tau-dot remained unaltered independently of condition. The type of trajectory clearly did not affect the visual control of braking in cyclists.

Keywords : Time to collision; Visual information; Braking; Cyclism.