Jan ZELEZNY , (TCH) the world record holder 98,48m – 1,86m , 88kg and Julius YEGO (KEN) 92,72m – 1,76m – 86kg . Have certainly different backgrounds and morphology , but so far as the javelin throw is concerned they have a lot more in common that could be expected at the first look of their data on the paper. In fact they are so similar that it is quite surprising . It could be a good coach’s training exercise to pick the differences . The 3 pages PDF document shows it all. Videos to be added ASAP.