Combine these strength moves with cardio for ultimate calorie-busting.
Works shoulders and arms
Sit on a chair or bench, feet flat on floor, holding a 5-pound dumbbell in each hand, elbows at your sides, hands near shoulders, palms facing forward. Pull abs in and slowly straighten your arms so they're fully extended overhead. Lower arms (again slowly) to starting position and repeat 10 times, progressing to 15 over a few weeks. Once you can do this, take a short rest and add another set of 15 reps.