Popsugar Health & Fitness Workouts Allyson Felix's "Abs by Allyson" Ab Workout I Tried Allyson Felix's "Abs by Allyson" Workout, and Now I Feel Like an Olympic Sprinter 19 August 2020 by Tamara Pridgett View On One Page Photo 1 of 11 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 1 Circuit 1, Exercise 1: 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. Hold for 30 seconds. Previous Next Start Slideshow Allyson FelixAthletes15-Minute WorkoutsHome WorkoutsBodyweight WorkoutsIntermediate WorkoutsCore ExercisesAb WorkoutsStrength TrainingWorkouts