Flip over to face the floor and start by placing your hands directly under your shoulders.
Engage your core and step your feet back to a plank position where the fronts of your hips are flat and your spine is neutral — no arching and no rounding your back!
Hold your plank for one minute, taking deep inhales and exhales throughout.
Think about pushing the floor away from you and separating your shoulder blades across your back. Be sure to keep the back of your head in line with the backs of your shoulder blades — no resting your chin on your chest!
"Planks are a total-body exercise: you're working your abdominals, shoulders, arms, and legs to keep yourself strong and stable!" Jetter says.