Standing with feet hip-width apart, hold a light weight in each hand, close to your sides. Raise your arms straight in front of you, so they’re parallel to the floor (hands facing in). Open your arms out to the sides so they are nearly—but not quite—at a 180-degree angle. Lower your arms down to the start. Do 6 cycles in this manner, then switch directions so you’re raising arms out to the side first, then closing them in toward center, then lowering down, for another 6 reps.