Your shoulders are more than mere mirror muscles — they play a critical role in most upper - body exercises and work hard to stabilize your chest during push - ups and bench presses. (fitnessandpower.com)
This could partly be due to poor posture, most prevalent among those who slump over a screen all day (not to mention gym - goers who overemphasize mirror muscles instead of focusing on balance). (health.com)
Awesome article, Garry, it makes perfect sense although unfortunately we focus too much on mirror muscles and develop imbalance. (chestsculpting.com)