Pec Fly / Rear Delt ndi makina ogwiritsira ntchito apawiri omwe amalekanitsa bwino chifuwa chokhala ndi manja osinthika komanso zogwirira.
Posintha malo oyambira ndikuyang'ana pamakina Watson Pec Fly / Rear Delt imaperekanso njira yabwino yodzipatula kumutu wakumbuyo kwa ma delts.
Kupanga ntchito yolemetsa kwambiri komanso kulemera kwa makilogalamu 100 kumapangitsa makinawa kukhala abwino kwa zaka zambiri akuzunzidwa m'malo ochitira masewera olimbitsa thupi olimba.