Straighten legs back out. Repeat. Why it works: The leg extension machine looks similar to a leg curl machine, but the roller pad is positioned lower to target the quads. Your quads support the ...

We're giving you Day 1 of our Ultimate Body Recomposition Workout, a leg day designed to build big-time muscle.

Stand tall holding your dumbbells with straight arms by your sides. Keeping your chest up at all times, take a step backward with one leg, bending your front knee until the back knee touches the ...