Pec Fly / Rear Delt ke mochini o sebelisang habeli o arolang sefuba hantle ka matsoho le matsoara a feto-fetohang ka botlalo.
Ka ho lokisa boemo ba ho qala le ho shebana le mochini oa Watson Pec Fly / Rear Delt le eona e fana ka mokhoa o motle oa ho arola hlooho e ka morao ea delts.
Kaho e boima haholo le boima ba lik'hilograma tse 100 li etsa hore mochini ona o sebetse hantle bakeng sa lilemo tsa tlhekefetso libakeng tsa boikoetliso ba 'mele tse thata.