The indigo seated calf indigo fitness was formed in 2014 by the merger of indigo23 and leisure lines indigo specialises in equipment for weightlifting strength and conditioning all strength equipment is designed and manufactured at their factory right here in the uk key features of the indigo seated calf anti slip footplate angled for full range of motion rotating seat ensures consistent relationship between the femur and knee pads spring assisted adjustable knee pads for tibia length ensu