Plank Up/Downs

Start with your wrists under your shoulders, keeping your elbows from locking.

Maintain a neutral spine, keeping your head facing the ground.

Lower yourself to the ground, alternating landing on each forearm. When both forearms are on the ground, lift yourself up by pushing up on your hand.

Squeeze your abs and glutes, keeping your knees from locking.

Modification:

Hold static plank.

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