Sets: 4–5, Reps: 10-20 (Do 8–12 reps each of front and back squats.)
START: Sit in a leg extension machine and adjust the roller so it rests across the front of your ankles.
EXECUTION: Perform a one-leg extension with your right leg while simultaneously crunching and twisting your torso to bring your left pec over your right knee. Reverse the motion, then repeat to the opposite side — extension with your left leg while crunching your right pec over your left knee. That’s one rep. After you complete all reps, finish the set with double-leg extensions to failure.