I-Fusion Series (Hollow) Leg Extension / Leg Curl ingumshini osebenza kabili. Idizayinelwe nge-shin pad elula kanye ne-ankle pad, ungakwazi ukulungisa kalula ukusuka endaweni yokuhlala. I-shin pad, etholakala ngaphansi kwedolo, iklanyelwe ukusiza ukugoqa komlenze, ngaleyo ndlela isiza abasebenzisi ukuthi bathole indawo yokuqeqeshwa efanele yokuzivocavoca okuhlukahlukene.