1
Start in a prone plank position with forearms on the ground, elbows directly under shoulders, body forming a straight line from head to heels, core engaged and neutral spine maintained
2
Press through forearms and toes to establish a stable base, keep shoulders packed and away from ears, engage abdominal muscles by drawing navel toward spine, maintain neutral head position
3
From plank position, extend one leg behind you while keeping the opposite leg planted, simultaneously reach the opposite arm overhead, creating a long diagonal line through the body, control the movement with core tension
4
Return extended arm and leg to starting plank position by pulling elbow and knee together toward center of body, complete all repetitions on one side before switching to the opposite side