This suggests that for improving vertical jump height, increasing high - velocity hip strength is probably going to be the most beneficial tactic. (strengthandconditioningresearch.com)
Additionally, there were no significant differences in vertical jump and standing long jump change between or within groups. (commons.lib.jmu.edu)
There are also plenty of vertical jump programs and 40 - yard dash workouts that will deliver good results for those who haven't done much serious training. (blog.trainheroic.com)