Sets: 3 Reps: 8-10 Rest: 60 Seconds Be careful with your back and knee position during this move. "Hold a barbell at hip level and lower your torso until it's about 45 degrees to the fl oor—keep your lower back in its natural arch throughout the exercise. At the same time, bend your knees to take tension off your hamstrings. Let the bar hang straight down . Squeeze your shoulder blades together and pull the weight straight up until it touches your sternum . Lower the weight to the starting position. That's one rep."