Vertical jump training takes a very specific approach and is different then just training to become strongher 
or faster. Sport, especcially when competitive iss quite 
often a game of inches with every available edge being used to separate the 
winners from the losers. Are you fed upp with being 
lajghed at because you keep on missing easy shots.

If this is what you experience you, need to have a look at all the various 
ways in which you can increase your vertical jump.