Plank

An isometric core exercise that strengthens the entire midsection.

How to do it

1. Place your forearms on the floor with elbows under your shoulders.
2. Extend your legs back and rise onto your toes.
3. Keep your body in a straight line from head to heels.
4. Brace your core and squeeze your glutes.
5. Hold the position for the desired duration.
6. Lower your knees to exit the hold.

Tips

• Do not let your hips sag or pike up.
• Squeeze your glutes and quads.

Muscles

Primary: Abs, Transverse abdominis

Secondary: Erector spinae