Do these chest moves 2 to 3 times a week and you bet your underwire you’ll have a perkier profile in 4 weeks. Half Push-UpA. B.  Place hands shoulder-width apart on bench. Balance on hands and balls of your feet so your body forms a straight line.Bend elbows and lower body half the distance to bench (6 to 8 inches). Hold for 30 seconds, and then press back up to start. Do 3 to 5 reps. MORE: 8 Things That Happen When You Finally Give Up Diet Soda Crisscross PressA. B.  Hold a 3- to 8-pound dumbbell in each hand and lie faceup on bench (or on a mat on the floor) with knees bent, feet flat on bench. With arms out at sides, bend elbows so upper arms are at shoulder level and palms are facing forward.Contract chest and press weights up so that left wrist crosses over right. Lower to start. On next rep, cross right wrist over left. Continue alternating crisscrosses for 8 to 16 reps. MORE: 10 Things Only Someone Who’s Trying To Lose Weight Understands Chest ExpanderCheck out   for more anti-aging moves to firm and tone your whole body!) For this chest stretch, sit tall on bench with arms extended in front of chest, fingertips touching. Squeeze shoulder blades together and reach right arm up and out as left arm goes down and out so arms form a diagonal line (pictured). Hold for 30 seconds. Return to start and switch arm positions to repeat the stretch. (Prevention’sGet Your Body Back DVD Quick Tip: While you do these moves, keep your shoulders down and back, abs tight, and torso long and straight so you really feel your chest muscles working. Rounding your shoulders forward is a no-no because it can strain your neck and shoulders.