Exercícios na borracha by Elton Fiebig

Creio que todos do judô conheçam o Elton. Aqui vocês podem acompanhá-lo demonstrando exercícios de condicionamento físico na borracha.
http://www.youtube.com/watch?v=xLUCV3llUt4

Embora não tenha conhecimento de estudos sobre esse treinamento no judô, resultados de outros estudos apontam para benefício na velocidade de execução. O resumo abaixo mostra resultados positivos na velocidade do chute no taekwondo.

The feasibility and efficacy of elastic resistance training for improving the velocity of the Olympic Taekwondo turning kick.
J Strength Cond Res. 2008 Jul;22(4):1194-7.
Jakubiak N, Saunders DH.
Strength and Conditioning Coach of The Central Taekwondo Academy, Falkirk, UK. nikosjakubiak@yahoo.com
In the Olympic sport of Taekwondo (TKD), elastic resistance training (ERT) is often used with the aim of improving kicking performance; however, the efficacy of this has never been examined experimentally. The purpose of this study was to investigate the effect of a TKD-specific, progressive ERT protocol on the velocity of the TKD turning kick. Twelve TKD athletes were randomly allocated to receive either a 4-week intervention of ERT plus usual TKD training (n = 6) or to a control group receiving 4 weeks of usual TKD training only. Kicking velocity from initiation to impact on a target was measured pre- and postintervention using a digital timer and two pressure switches. Kicking velocity improved significantly (by 7%) in the ERT group, whereas there was no improvement in the control group (p < 0.05). These data suggest that ERT is a feasible means of sport-specific resistance training for TKD and that TKD performance could benefit from an improved velocity of the attacking turning kick.