This exercise will keep your back as strong as it can be, says Giliotti, and give your legs and torso a workout too. Deadlifts, in which you start in a neutral bent-over position and raise a weighted barbell or dumbbells from the ground, are easy to do— and easy to do wrong. So technique is important to prevent injury. Get some pro tips online or at your gym to be sure you're getting the most out of doing deadlifts.
How To: Holding a light dumbbell or kettlebell, lower your body towards the floor as if about to sit back into a chair. In the down position your thighs should almost be parallel to the floor and your knees directly over your ankles. Keeping your back straight and your neck and chest upright, use your glutes, quads, and hamstrings to slowly stand up tall. Return to the starting position and repeat. Do 3 sets of 15 reps. (WATCH how to deadlift here.)