Plank Jack

Starting Position

1. Spread your arms shoulder-width apart and lie face down with your knees straight.

2. Place your hands under your shoulders and keep them fixed on the floor.

3. Engage your hips and core to keep your body in a straight line.

Proper Form

1. Spread your arms shoulder-width apart and, in a prone position, lightly engage your core to create a straight line with your body.

2. Kick off the ground with both feet simultaneously and land wider than shoulder-width apart.

3. Again, kick off the ground with both feet simultaneously and return to the starting position.

Breathing Technique

Exhale while spreading your legs and inhale while bringing your legs together.