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Posterior chain and its effect in extension http://t.co/YpPHylAUpW
Posterior chain and its effect in extension http://t.co/YpPHylAUpW
@jairburboa http://t.co/I1YkW3YWOD ese si.
Hey @bretcontreras Have you seen this study? http://t.co/5IWMyZSztA
Posterior muscle chain activity during various extension exercises: an observational study (2013) FREE http://t.co/IMTxtCCt8p