One

STARTING POSITION: Start by lying on your stomach and prop your weight on your forearms and toes. Similar to traditional plank position.

Two 

Maintain this traditional plank position by keeping a straight line from your head to your feet and hold this position for the entire exercise, making sure your abs, glutes, and lower back are engaged. 

Three

Simply hold this position, and then simultaneously lift the right leg and the left arm, (opposites) to hold for two to three seconds, and switch. It may be a bit challenging to balance while holding but that’s where the tightening of those above mentioned muscles comes into play so you don’t tip over. : )