Alternativa ecológica en la evaluación del salto de longitud de atletas paralímpicos/Ecological alternative in measuring long jump of paralimpics athletes/Alternativa ecológica para avaliar salto longas o Paralympians atletas

The Paralympic Games are the maximum exponent of worldwide competitive sport practiced by people with disabilities. In this paper we present the research conducted during 2012 London Paralympic Games, analysing the actions performed by blind athletes in the long jump, using four Exilim F1 (Casio, Japan) cameras for data collection. We used two of them to record at high speed (512x384 píxels at 300 Hz) and two at high definition (1280x720 pixels at 30 Hz), allowed us not to interfere in the competition. The analysis and extraction of the kinematic image data was performed using the Kinovea V0.8.15 software (available at http://www.kinovea. org). The variables analysed in the last step of the approach run were: Step speed, Vp (m / s); Resulting speed, Vr (m / s); Step frequency, Fp (Hz); Stride length, Lp (m); Contact time, Tc (s); Flight time, TV (s), Step time, Tp; BCM height h1 (m); take offangle, a1 (2) and take offduration, TC0 (s). It has been a positive influence in the Tc1, Tv1 and Vp1 and negative one in: a1, Lp1, TP1 and TC0 variables. The results have identified the variables that determine performance in horizontal jumping with existing athletes without disabilities and similar technical skills. The methodology has been showed reliable, valid and accurate being very useful in competitive areas not to interfere in the sports area