Arm Extension to Shoulder Tap: Start in a plank position with your wrists under your shoulders. Your body should form a straight line between the top of your head and your toes. Engage your abs and glutes as you extend your right arm straight out and hold it for one second. Then, use the right hand to tap your left shoulder. Repeat with your left arm and continue to alternate sides.
Where you’ll feel it: Your core and arms.