Using Grip Training to Hack the Nervous System and Improve Performance

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by SETH OBERST|DPT, CSCS

Using Grip Training to Hack the Nervous System and Improve Performance

A big grip tells the brain that the position is a stable one and that it is safe to generate a lot more force without risk of destabilization and injury.
What is the target organ/system of training? While many think it’s the muscular or cardiovascular systems, the true target is the nervous system. The brain exists to move us through and interact with the environment. The sensory input our nervous system receives from interacting with the environment drives the motor output from the brain to the neuromusculoskeletal system. By altering sensory input, we can change — and potentially improve — neuromotor output.  One way to hack the nervous system and increase stability throughout the system is through challenging the grip.

Sensory Input and Motor Output

Sensory Input and Motor Output
This image is a homunculus (literally meaning “little man”), and it is both grotesque and informative — not unlike the author of this article. It is essentially a representation of the processing regions devoted to each area of the body. The importance here is the tremendous amount of sensory and motor cortex devoted to the hands and feet (more on them in a future post). Our evolution has clearly indicated the importance of sensory input and motor output through the hands given it’s large representation in the brain. We know sensory input is absolutely critical in the motor development of kids, and those who struggle with sensory integration have some serious movement problems. So why not better utilize sensory input with our training and optimize adaptation?

By challenging the grip and maintaining a fist, we provide a rich sensory input to the brain that allows us to produce more stability and a system-wide increase in force output (which is what we really want). The strength of this stimulus probably improves motor learning, too.

A big grip tells the brain that the position is a stable one and that it is safe to generate a lot more force without risk of destabilization and injury.

Don’t believe me? Try flexing your biceps without making a fist — it’s really hard to generate much of a contraction. Then make a crushing fist while contracting your biceps. The result is a much greater biceps contraction as you are amplifying the motor output of the brain — often called irradiation or overflow. By augmenting the stronger parts of the pattern, we can facilitate improved neuromuscular activation through the weaker parts.

The best athletes can create tons of force AND control on demand; grip training is a way to tap into the nervous system and optimize adaptation.
Seriously, try making a fist as hard as you can: you feel the tension all the way up to the middle of your back as this overflow sets the scapulae and thoracic spine (spinal control is always crucial), allowing a stable platform for power generation by closing the circuit. Pavel has used this for years with the Soviet Special Forces and his Kettlebell training paradigms.

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