Forearm Plank — how to, form & muscles worked

How to do a Forearm Plank

Set your forearms on the floor with elbows stacked directly under your shoulders.
Extend both legs behind you and rise onto your toes.
Brace your abs and squeeze your glutes so hips, shoulders, and heels form one line.
Keep your neck long and gaze at the floor, breathing steadily throughout.
Hold for the interval without letting your hips drop or pike upward.