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http://www.nautilus.com/catalog/productdetail.jsp?PRODUCT%3C%3Eprd_id=845524441760486 claims that
Internally rotated arm position reduces shoulder impingement
in this type of pec fly:
Is that true?
Videos of people using this pec fly:
Chest fly (= pectoral fly = butterfly) machines are otherwise designed with one of the following two types:
