Injin Smith wani nau'in kayan aikin horar da nauyi ne wanda ya ƙunshi barbell da ke cikin layin dogo na ƙarfe, yana barin motsi a tsaye kawai.An fi amfani da shi don motsa jiki kamar squats, matsi na benci, da danna kafada.Injin Smith suna ba da jagorar motsi don motsa jiki, suna taimakawa tare da tsari ...
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