Many jumping exercises claimed to be able to increase your vertical jump.
Some of them are real stuff while the rest just exaggerating.
I will tell you the unnoticed training used by not so famous normal people, but surprisingly effective because they actually jump higher than other players in the basketball, volleyball, soccer, football and other sports play.
Remember to warm up first so you get your muscles ready for the training.
You can warm yourself up with stretching and do small running on the ground.
You can start with jump on the stair steps.
First you jump on the first step, do it on 3 sets, 10 jumps each set.
Then you continue with the second stair step, meaning you jump directly to the second step, not jumping step number one and two.
Increase your jump height gradually.
You will be able to jump higher and further as your legs and calf muscles strengthened.
The second exercise is to jump and bend your knees.
Not just a normal knee bend, your target is to touch your knees to your chest while you are jumping on the air.
You need to keep your back straight while jumping, do not bend your back while on the jump.
I know it sounds very hard, the truth is that it is hard, but not impossible.
You will start with small jumps first then you do the knee bending.
You do it in separate exercise, but as you try to do it together, you will gain the momentum enabling you to progress until you can actually touch your knees to your chest while jumping.
Please use a training mattress on the ground while you do the jump higher exercises as you will need them just in case you lose your balance and fall.