title: The double back salto dismount from the parallel bars.
abstract: The purpose of this study was to identify those mechanical determinants or their trends that distinguished a gymnast's best performance of the double back salto dismount on parallel bars from those judged to be inferior. Dismounts, in the tucked position, by nine Canadian gymnasts were analysed. Unique to this study was the inclusive analysis of multiple performances of the same skill by these athletes. It was felt that within-subject comparisons would reveal the kinematic variables on which the gymnast may focus in order to achieve their best performances. A non-parametric median sign test was used to compare mechanical variables, within subjects, between the dismount judged the best and those dismounts awarded a lower score. Three judges judged each dismount. In comparison to poorer performances of the dismount, statistical analyses revealed that athlete's best performances were characterised by (1) a higher release point, more vertical velocity yet with less angular momentum at take-off, (2) greater height, with a tighter and earlier tuck position during the flight phase, and (3) a greater range of motion and a more compact squat position at landing (all p's < .06).
authors.affiliation: Faculty of Physical Education and Recreation, University of Alberta, Edmonton, Alberta, Canada.
authors.forename: Pierre
authors.initials: P
authors.lastname: Gervais
authors.forename: John
authors.initials: J
authors.lastname: Dunn
mesh_terms: D001696:Biomechanical Phenomena; D006173:Gymnastics / Q000502:physiology*; D006615:Hip / Q000502:physiology; D006801:Humans; D007717:Knee / Q000502:physiology; D016059:Range of Motion, Articular / Q000502:physiology; D019876:Sports Equipment; D013647:Task Performance and Analysis