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Lie on the floor, back flat and knees bent with your feet planted. Hold a dumbbell in each hand, starting with your arms straight up toward the ceiling, with the dumbbells directly over your chest and about 1 inch apart, palms facing your feet. From there, bend your elbows to lower the dumbbells slowly until your upper arms are flush on the floor. Pause for a one-count, then powerfully press the weights upward. Throughout, your wrists and elbows should remain stacked atop one another, forming a line that remains directly perpendicular to the floor.