Slumping is bad for your spine and not so great for your appearance either! Standing with good posture can make you look up to 10 pounds thinner. Strengthen your upper back and stand tall with the reverse fly. Here's how to do this simple exercise.

• Holding a dumbbell in each hand, stand with knees slightly bent. Keeping your back flat, bend forward at the hip joint.
• Exhale and lift both arms to the side, maintaining a slight bend in the elbows and squeezing your shoulder blades together. Then with control, lower the dumbbells back toward the ground.
• Do three sets of 12 to 15 reps.