No plyometrics until you squat THIS much...

The world of exercise science and program design is constantly changing. Not because the ideals, principles and philosophies are wrong, but because we really are beginning to learn so much about the body and how it responds to exercise.

One of the hotter topics is that of plyometrics. Most people "know" what plyometrics is. They may have the textbook definition of "a rapid eccentric muscle action followed by an immediate concentric muscle action resulting in increased power," but they have an image in their head of what plyometrics is. And it usually looks something like the picture to the right.

But there are different levels of plyometrics and the truth is most people begin a plyometric training program at far too high of an intensity. But there really isn't a set standard that a person must meet prior to beginning a plyometric program. 

There used to be a "generally accepted" formula for plyometrics and it was that you had to be able to back squat twice your body weight. However this immediately labeled plyometrics as a VERY exclusive type of training program. After all, how many people can actually back squat twice their body weight? If I were to do that I would have to be able to squat 410 lbs!! 

So where did this formula come from? Well it was grounded in science but wasn't necessarily thought about completely. You see when a person is coming down from the peak of a jump their are accelerating at 9.8 meters per second squared. So until the person hits the ground, they are accelerating, or picking up speed, until they land. And for most people the range of their jump has them hitting the ground at a fairly high rate of speed. So much that research has shown the amount of force a person lands with is equivalent to roughly twice their body weight. This we know is true.

However, it must be considered that A) on a squat jump landing the person usually does not land in a full squat position, and B) not all plyometrics involve such extreme landings. The video below gives some plyometric exercises that we use on a regular basis.

So then what are we to do? Do we simply focus on kids getting better at their back squat so they can FINALLY do plyometrics with them? That is obviously not going to happen. Instead what we at Pair & Marotta Physical Therapy do is have them work through a progression. Obviously not every plyometric involves a depth jump from a great range of motion. 

In addition, the thing to consider is that in sport, most plyometric type of contractions involve vertical jumps. Most require movement in multiple planes of motion.So instead we can and occasionally do have our athletes perform box drop jumps. But most often we use lower level, more laterally stressful plyometric exercises.


As a coach, you too must decide the cost to benefit factor and determine what type of plyometric exercises are going to be best for your athletes. Have a system. Or better yet, give us a call to help design and implement a plyometric training program with your athletes or team!