Stand tall with your feet about shoulder-width apart, keeping your legs relatively straight.
Movement
Forward Hinge: Bend at your hips to reach your hands toward the floor, keeping your back mostly flat and legs straight until your fingertips touch the ground.
Hand Crawl: Place your hands down and begin 'walking' them forward on the floor, shifting your weight onto your hands.
Plank Position: Continue crawling forward with your hands until your body reaches a full, straight-line plank position, supporting your weight between your hands and toes.
Return: After pausing for a second in the plank position, walk your hands backward, reversing the movement until you return to the starting upright standing position.
Form Tips
Keep your core tight throughout the entire movement to protect your lower back when in the plank position.
You can bend your knees slightly if your hamstring flexibility is limited, but aim to keep them as straight as possible.