Kirkirar USB shine injuna guda daya na ayyukan da ya hada da na USB Erosverover, ja sama, biceps da kwali. Galibi yana motsa deltoid, rhomboid, rhomboid, trapezius, infraps, infrapsadatus, bracachioRadalis, trapeziusd | na sama wannded highstensor. Kirkiran kebul-over ne motsi na ware wanda ke amfani da tari na USB don gina mafi girma da tsokoki mai ƙarfi pectoner. Tunda ana yin ta amfani da hanyoyin daidaitawa, zaku iya yin balaguro daban-daban na kirjinku ta hanyar saita ire-iren matakai daban-daban. Abu ne gama gari a cikin babban jiki da motsa jiki mai gina jiki, sau da yawa azaman pre-shaye-shaye a farkon wani motsa jiki, ko kuma haɓaka a ƙarshen. Sau da yawa a hade tare da wasu layuka ko flyes don niyya da kirji daga kusurwa daban-daban.