If you are trying to improve your performance in any sport or activity that requires powerful legs, you will want to do exercises that build strength and explosive power. Exercises that help improve your vertical jump will absolutely help.

1. Use Recovery Time To Get Stronger to Jump Higher

2. When we are training hard trying to better our jumping
strength and performance we need to think about
recovery time.
It's this recovery time that we will actually gain from the
results of our training.
Doing squats and bench presses will tear down our
muscles and the recovery time will build them back
stronger than before.

3. If we do not take advantage of rest so we can rebuild,
we may continue to progress at getting stronger for
some time then eventually will reach a point of no
returns.
Many people, when they stop making progress in their
strength gains will try to do even more to get past their
sticking point.

4. Mostly what really needs to be done is cut back a little
so the body or muscles can have time to rebuild.
Your body may be breaking down faster than it can
repair.
Sometimes just cutting back on workout intensity or the
number of reps is all that is needed to start making gains
again.
Or you may need to take a day or two off during the
week.

5. There is a thing called systemic fatigue which is when your
body is broken down like from heavy weight lifting and now
your brain is aware of it.
You can feel run down and moody with a lack of energy.
It can take about 48 hours to recover from systemic fatigue.
You can generally gauge if you have recovered from
systemic fatigue say after a weeks rest you are able to do the
same bench press weight you could do before.
If you can only do less your body may still be fatigued.

6. Discover more information on how to increase your
vertical jump skills at Increase Strength for Vertical
Jumping.