This is an exercise from weightlifting. There he will be used as preparation for the snatch. The hip extension can be trained fairly easy and isolated this way. Exercise is ideal for runners with moderate hip extension or a bad pelvis position while running.
Halter is firmly fixed with stretched arms. Explosively stretch the hip while the halter is 'thrown' forward. You can use the same weights and series you normally use for cleans.
Caution! Under light fatique some athletes tip over, allow enough space on the floor around the athlete.