Triple jump is an athletic event that requests specifically a balanced foot support in order to optimize the performance. The first ray of the foot (hallux and first metatarsal head) has an important function to propel the body during take off for the hop and the step. Dynamic foot pressure is a good indicator and it has been used in various studies to detect foot pathologies (Putti et al. 2010). A large consensus displays that normal feet have the greatest pressure located on the second and third metatarsal heads. Sanchez-Rodriguez et al. (2012) measured plantar pressures on 400 participants according to the type of foot with the FootScan platform (4096 sensors) operating at 150 Hz. However, a repetitive task like take off caused biomechanical foot adaptations and could modify plantar pressures distribution (Ledoux and Hillstrom 2002, Rao et al. 2011). The aim of the study was to investigate, during a triple jump event, the impact of the repetition of triple jump on the dynamic plantar support. We proposed to assess the likely architectural foot modification due to the repetitive hard impact and the repercussion on the kinetic of the plantar support.
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