Popsugar Fitness Workouts 3-Minute Plank Workout Tone Your Arms and Core With This 3-Minute Plank Workout January 9, 2016 by Jenny Sugar View On One Page Photo 1 of 5 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 1 Frogger Begin in plank position with straight arms and legs. Gently hop the feet forward behind the hands. Then hop the feet back to plank position. This counts as one rep. Complete as many reps as you can for 30 seconds. Previous Next Start Slideshow WorkoutsStrength TrainingBodyweight WorkoutsAb WorkoutsBeginner Workouts5-Minute WorkoutsArm Workouts