Quote:
Originally Posted by Robb Wolf
"The key to the lateral sub-system is that we engage these additional muscles in their normal role of stabilizers, not as movers."
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IIRC, Ethan Reeves, the strength coach at Wake Forest, also uses one-armed upper body exercises for their ability to activate stabilizer muscles in the core. In both cases, the use of only one limb creates instability, which recruits the stabilizers.