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Automatické přehrávání
Přehrát
this is PIR for quadriceps not rectus femoris, which does hip flexion, to isolate, you position in side lying, resisting hip flexion while making quads passively insufficient
this is PIR for quadriceps not rectus femoris, which does hip flexion, to isolate, you position in side lying, resisting hip flexion while making quads passively insufficient