Abstract
The purpose of this study was to examine the effects of weighted javelin training on the throwing distance of the regular-weight javelin in terms of movement patterns and practice factors, and to obtain suggestions for training. The subjects were two male javelin throwers. The subjects trained for 12 weeks with a 900 g weighted javelin. Pre and post the training, the distance thrown with a regular-weight javelin was measured. As a result, Subject A practiced run-up throw with a weighted javelin, which improved the blocking motion and the kinetic chain from the lower limbs to the trunk. In addition, the contribution from the long-axis rotation of the trunk continued until release. As a result, the throwing distance increased by 1.62 m. On the other hand, Subject B practiced run-up and standing throws with a weighted javelin, which resulted in an excessive increase in run-up speed and the subject’s body facing the throwing direction when the left foot contact. As a result, the throwing distance decreased by 1.47 m. These results suggest that the use of the weighted javelin in the run-up throw is effective for athletes who have problems with the kinetic chain from the lower limbs to the trunk, and for those who have problems with pushing the right shoulder during release.
