Planks are a wonderful exercise for trunk, hip and shoulder stability and moving planks are far more effective and burn more calories than isometric planks. So once you’ve mastered the plank it’s time to start moving in that plank, to start challenging the core and to start burning more calories.
Plank with Walk In:
From the full plank position with hands under shoulders and back straight, walk into a tuck by taking small steps forward and keeping the knees close to the floor and hips down. Then take small steps backwards and return to starting position.
Plank with Walk Around:
From the full plank position, take small steps with both feet to one side then rotate hand and finish in a side plank. Next, walk feet back and around to the other side and rotate into a side plank.
If your wrists bother you in a full plank then drop down onto the forearm and walk forward and back or side to side on your forearms and toes. To modify the plank, drop to your knees but continue to shift your body weight from side to side.