The leg press is a compound weight training exercise in which the individual pushes a weight or resistance away from them using their legs. The term leg press machine refers to the apparatus used to perform this exercise.Using the leg press machine can help strengthen the muscles in your lower body and, in turn, help improve your balance and stability. These improvements will help reduce your risk of falling and prevent injury.There are different versions of the leg press machine that aim to train the quads and glutes: the standard 45-degree linear leg press, horizontal seated leg press, vertical leg press, and the dual-function leg press.