practice to be able to jump high enough to dunk?

is jumping 1.40 metres in high jump good for a 13 year old

can anyone give me a great tip for high jump?please and is anyone know hoewto shoot with more powers when you play the netball.

What is the best way to get really good at high jump? I can jump 5' 8" now and want to get better!!! Im only going into 11 gr...

I want to know some weight lifting or just exercises to increase my vertical jump so I can touch rim and increase my basketba...

Does anybody have any exercises I can do to be able to dunk by the 9th grade. I don't have any equipment or a gym

how high aRE the high school hurtels usally??

i am 6ft tall and i play basketball but i can't dunk the rim..i have tried skiping, it did worked a little but i still can't ...

I need to practice heading and I need 5 different drills to help practice. Please answer soon???

I recintly found out that I'm good at long jump, I'm 14 and the highest I've jumped is 3.87meters, and on average im jumping ...

How do you preload shocks to jump farther do you just lean back and pull up at the lip