Discovery-P Series Leg Extension idapangidwa kuti igwiritse ntchito njira yosuntha podzipatula ndikuphatikiza kwathunthu ma quadriceps. Kapangidwe kameneka kamene kamapangitsa kuti katunduyo aziyenda bwino, ndipo mpando wokhazikika bwino wa ergonomically ndi shin pads zimatsimikizira kutonthoza kwa maphunziro.