Popsugar Health & Fitness Workouts How Do I Work My Transversus Abdominis? These Are the Ab Muscles Serena Williams Said She Always Focuses on and Why It's Important 13 May 2020 by Tamara Pridgett View On One Page Photo 3 of 12 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 3 Forearm Plank Start face down on the floor resting on your forearms and knees. Push off the floor, raising up off your knees onto your toes and resting mainly on your elbows. Contract your abdominals to keep yourself up and prevent your booty from sticking up. Keep your back flat — don't let it droop or you'll be defeating the purpose. Picture your body as a long, straight board or plank. Previous Next Start Slideshow Black WomenTrainer TipsWomen Of ColorGIF ExercisesAthletesFitness TipsBodyweight ExercisesCore ExercisesInjury PreventionWorkouts