The Plank

Goal: To engage the core.
With body in a push-up position, resting on the elbows not hands, keep body straight like a plank, holding for a count of 10 and then drop the knees to rest. The hips should be in line with the shoulders, not higher or lower. Do five repetitions if possible. Then in the plank position, isolate the shoulder movement, holding the rest of the body as still as possible, bring the shoulder blades together and then move them apart. Drop the knees to rest, then go into the plank position and tip the hips back and forth.