SIDE PLANK
This exercise works the obliques in your core but also recruits your shoulders while you try to stabilize your body. Planking requires a good amount of balance because you’re using just your feet and elbow to keep your body lifted.
1 Lie on your left side on the floor and place your left forearm flat on the floor below your left shoulder.
2 Lift your hips until your body forms a straight line from head to toe. Hold this position for 30 seconds, then lower your body to the floor. Repeat these steps on your right side.
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