Keywords: Triple jump, technique Most, if not all women triple jumpers use opposite arm movement, known as the single arm technique, with individual peculiarities between athletes. After analyzing 54 jumps by 23 female jumpers, the authors conclude that even current best jumpers have some .improvement reserve. because of weaknesses in the .hop-step. link related to this technique. The main purpose of the study was to determine the effect of .mixed arm movement., a combination of single and double arm techniques, in which the .hop. and the transition to the .step. are performed with opposite movement of the arms and legs and then, during the .step., the arms are returned back together so that the .jump. is performed with both arms swinging forward. A one year long pedagogical experiment with a female triple jumper (personal best of 13.78m) to introduce the change in the technique is described, including the special exercises used and details of the applied training load. The authors conclude that change led to a significant improvement (to 13.97m) and predict the technique will be more widely used in the future. The also conclude that the approach used for introducing the change was efficient. This paper was awarded third place in the 2004 European Athletic Association Science Awards.