The F jerin ƙarfi inji, F90 daya Dual tashar motsa jiki inji, watau horar da Prone Leg Curl da Leg Extention a kan daya inji.designed tare da dace, sauki-to-daidaita kafa kushin da kuma shin kushin daga wurin zama. Ƙirar kushin ƙafar ƙafar ƙafar ƙasa-ƙara yana sauƙaƙe tsari mai kyau na ƙafar ƙafa. Masu motsa jiki na iya sauƙaƙe nauyin ƙarawa tare da sauƙi na turawa na lefa don ƙara nauyin aikin.