ɪɾ ˈɔːlsoʊ ɐlˈaʊz wˈeɪt ɹᵻsˈɪstəns təbi ɪn ˌɛni dᵻɹˈɛkʃən ˈaɪ.ˈiː. dˌaʊn æz wˈɛl æz ˈʌp, ɔːɹ ɹˈoʊɾɚɹi, ænd fɚðə jˈuːzɚz ɹˈeɪndʒ ʌv mˈoʊʃən təbi kənstɹˈeɪnd, ðɛɹbˈaɪ kˈɑːnsəntɹˌeɪɾɪŋ ˈɛfɚt ɪn ɐ spəsˈɪfɪk mˈʌsəl ɡɹˈuːp.
It also allows weight resistance to be in any direction (i.e. down as well as up, or rotary), and for the user's range of motion to be constrained, thereby concentrating effort in a specific muscle group.