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Primario
Secundario
Terciario
Dificultad
Novice
Fuerza
Push
Agarres
None
Mecánica
Isolation

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Sit on the machine with your back against the cushion and adjust the machine you are using so that your knees are at a 90 degree angle at the starting position.
Raise the weight by extending your knees outward, then lower your leg to the starting position. Both movements should be done in a slow, controlled motion.