Popsugar Health & Fitness Workouts Are Crunches Bad For Your Back? The Reason You Should Stop Doing Crunches, According to an Expert 10 July 2018 by Tamara Pridgett View On One Page Photo 6 of 10 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 6 Plank With Shoulder Tap Begin in a plank variation with your feet slightly wider than your hips for added stability. Keeping your torso stable, bring your right hand to your left shoulder, then return your right hand back to the mat. Bring your left hand to your right shoulder and return it to the mat. This counts as one rep. Previous Next Start Slideshow Fitness TipsBack PainCore ExercisesInjury PreventionWorkouts