Plank

How to do it

1. Set your forearms on the floor under your shoulders, legs extended behind you, toes tucked.
2. Lift your hips so your body forms one straight line from head to heels.
3. Squeeze your glutes and brace your abs as if bracing for a punch.
4. Keep your neck long and your gaze just past your hands.
5. Hold steadily for the prescribed time, breathing normally.