Plank
Hold a straight line from head to heels on your forearms. Tension matters more than time.
How to do it
- Elbows under the shoulders
- Squeeze your glutes and brace your abs
- Push the floor away
- Neutral neck, eyes down
Watch out for
- Hips sagging toward the floor
- Hips piked high
Make it easier
Hold the plank from your knees, or with hands on a bench.