How to use weightlifting leg machines the right way! Common mistakes prevent people from getting the full benefit of using these machines. Don’t leave half your gains behind, use them correctly to get thick strong legs. Video created by Carey Martell, co-founder of Power Palace Gym in Newberg, Oregon. In this video we show how to use a leg curl machine but the advice applies to all kinds of leg machines such as leg press, leg extension, calf raise, glute kickback and more.