Ko te Hammer Strength Select Leg Curl he wāhanga matua o te whanaketanga o te whakangungu kaha. Mā te koki rerekē i waenga i ngā papa hope me te uma ka whakaitihia te ahotea o raro o te tuara, ā, mā te tūranga tīmatanga ka taea te whakarerekē ka whakaratohia he tīmatanga rerekē e rima. Mā ngā wāhanga 22 o te raina Hammer Strength Select ka whakaratohia he whakataki whakamīharo ki ngā taputapu Hammer Strength.
He taputapu whakangungu kaha pakari, he mea hanga mō te kaitākaro tino matatau me te hunga e hiahia ana ki te whakangungu pērā i tētahi. Neke atu i te 25 tau, kua whakamahia ngā taputapu Hammer Strength e ngā kaitākaro ngaio e whakataetae ana i te taumata teitei, tae atu ki ngā kaupapa hākinakina o ngā kāreti me ngā kura tuarua.
Kua hangaia ngā taputapu Hammer Strength kia nekehia e te tinana. He mea hanga hei whakarato i ngā whakangungu kaha mahi e puta ai ngā hua. Ehara i te mea motuhake te Hammer Strength, engari he mea hanga mā te hunga katoa e hiahia ana ki te whakapau kaha.