Focus on hips and hamstrings. Stabilize the pelvis is critical - don't let the hips wobble. Also - the anchor bridge is TOUGH... Remember it is NOT a regular bridge - the heels must be further away from the hips than a regular yoga/PT bridge. Also the feet are NOT flat - the toes are lifted and the heels are wide. The knees push hard together and the heels energetically pull toward the hips. Also, for dead bugs - the legs are perfectly perpendicular to the floor, NOT drawn into the chest - that's actually easier. Just some notes! Used: yoga strap, block, chair.