I-Predator Series Leg Extension / Leg Curl ingumshini osebenza kabili. Idizayinelwe nge-shin pad elula kanye ne-ankle pad, ungakwazi ukulungisa kalula ukusuka endaweni yokuhlala. Isihlalo nephedi yangemuva kuthuthukiswe ngokwe-ergonomically ukuze uthole ukusekelwa okungcono nokunethezeka. Futhi i-shin pad, etholakala ngaphansi kwedolo, iklanyelwe ukusiza ukugoqa komlenze, ngaleyo ndlela kusize abasebenzisi bathole indawo yokuqeqeshwa efanele yokuzivocavoca okuhlukile.