Do you have an over-active posterior chain? check out this test to se if you do.

Given how popular it is to train our posterior chains, it seems counter-intuitive that an athletes' movement dysfunction (e.g. early butt-wink in the squat) might be driven by an over-active posterior chain.  This is actually more common than you might think and quite possibly is the hidden factor preventing your athletes from performing at their potential. 
Trunk stability is a pre-requisite for all movement. The way in which an athlete stabilizes their spine to execute a movement varies widely. There is, however, a common pathological stabilizing strategy that is perpetuated by our obsession with the posterior chain. It is called an Extension/Compression Stabilizing Strategy (ECSS). As you might guess by the name, athletes who use this strategy stabilize their (lumbar) spine with extension and compression.  Such a strategy produces movement dysfunction and may actually result in injury, both directly and indirectly. 
Having a strong posterior chain is no doubt important, but we do not want an over-active posterior chain, as is common in strength training athletes and athletes who participate in predominantly sagittal plane sports. 
The test in this video is a very quick and easy way to screen your athletes to see if they do in fact have an over-active posterior chain. 
Check it out!
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This video was taken at the OPEX headquarters after we filmed a podcast about the importance of trunk stability training. OPEX puts out a lot of phenomenal content.  If you are in the training space, you should be following them. 

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