Popsugar Fitness Workouts Stretches to Improve Posture and Core Strength Crunches Are Bad For Your Posture — These 2 Stretches Will Lengthen Your Tight Muscles March 8, 2020 by Tamara Pridgett View On One Page Photo 3 of 3 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 3 Pin It! Previous Next Start Slideshow Fitness TipsWorkoutsStretchesInjury Prevention