摘要：Background and Study Aim: Judo is categorized among events which develop apart from technical aspects many physical abilities such as explosive strength, speed and co-ordination. One representative task which involves the above mentioned abilities when performed from any athlete is the vertical jump. Purpose of this paper is to answer the question: if there are differences between untrained young males and advanced level Greek judo athletes in jumping ability in four different vertical jumping tasks. Material and Methods: Twenty male [(10 untrained/10 advanced ones), mean age: 19.4 ± 1.6 years/ 17.3 ± 1.2 years respectively] performed squat jumps, countermovement jumps and drop jumps from 20 and 40 cm height (DJ20 and DJ40, respectively). Kinetic data for further analysis were collected by a ground mounted 40 x 60 cm force plate. Results: Advanced young judokas presented higher scores in all examined jumping tasks compared to untrained ones, revealed shorter duration of examined contact times of all tasks and as a result better utilisation of stretch-shortening cycle mechanism. Total neuromuscular activation that adopt judokas reveals a more mature and skill dependent strategy compared to untrained ones. Conclusions: Vertical jump does not characterizes from a technical point of view a judo athlete but it seems that performance in vertical jumping tasks is affected by the participation and years habituation to ballistic and explosive strength training. Judo specific training in advanced-level judokas improves and induces specific neuromuscular alterations as well as performance in various jumping tasks
