The changes in fractal dimension after a maximal exertion in swimming

Barbosa, Tiago M.; Chen, Simin; Forte, Pedro; Morais, Jorge E.

doi:10.1109/tishw.2016.7847776

Cited by 1 publication

(1 citation statement)

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“…In wheelchair racing, aerodynamic drag has a significant impact on the performance at speeds higher than 5 m/s [ 4 – 8 ]. At world record pace, drag force may account for 34.89% of the overall resistive forces [ 9 ]. However, no study was carried out comparing the aerodynamics of a sprinter in the key-moments of the stroke cycle (i.e.…”

Section: Introductionmentioning

confidence: 99%

The variations on the aerodynamics of a world-ranked wheelchair sprinter in the key-moments of the stroke cycle: A numerical simulation analysis

et al. 2018

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Biomechanics plays an important role helping Paralympic sprinters to excel, having the aerodynamic drag a significant impact on the athlete’s performance. The aim of this study was to assess the aerodynamics in different key-moments of the stroke cycle by Computational Fluid Dynamics. A world-ranked wheelchair sprinter was scanned on the racing wheelchair wearing his competition gear and helmet. The sprinter was scanned in three different positions: (i) catch (hands in the 12h position on the hand-rim); (ii) the release (hands in the 18h position on the hand-rim) and; (iii) recovery phase (hands do not touch the hand-rim and are hyperextended backwards). The simulations were performed at 2.0, 3.5, 5.0 and 6.5 m/s. The mean viscous and pressure drag components, total drag force and effective area were retrieved after running the numerical simulations. The viscous drag ranged from 3.35 N to 2.94 N, pressure drag from 0.38 N to 5.51 N, total drag force from 0.72 N to 8.45 N and effective area from 0.24 to 0.41 m2. The results pointed out that the sprinter was submitted to less drag in the recovery phase, and higher drag in the catch. These findings suggest the importance of keeping an adequate body alignment to avoid an increase in the drag force.

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Section: Introductionmentioning

confidence: 99%