Here’s an example of impact exercises that are performed to be able to maximize the spring strength for jumping.
They are called speed bounds.
You definitely need an intact human spring mechanism to do these training drills.
As you can see in the video he’s jumping on 1 foot and throwing his body into very high velocity jumps or bounds.
speed bounds
In these jumps he can put an impact of between 5 to 10 times the bodyweight. So if this man weighs 180 pounds the impact force is close to 1500 pounds on the human foot and the joints above all the way up to the head.
These drills are not only done at the highest level of sports.
There are children in middle school that are actually doing jumping activities with these forces that can lead to developing maximum spring integrity.
What about jumping jacks? Jumping jacks put impact on the body. Even grade school children do that.
Jumping Jacks
If you could do these exercises as a child but cannot do them now we call that a “used to do” which is a sign of aging.
This video tutorial was taken from the lecture:
Run For Life! Barefoot 
Presented by Dr James Stoxen DC
The 8th Annual Malaysian Conference And Exhibition On Anti-Aging, Aesthetic And Regenerative Medicine
Kuala Lumpur, Malaysia
April 30 — May 2, 2011
