The common misconception is that “good posture” equates to having a “straight fairly rigid spine,” that the goal of “posture training” should be to turn your body into something akin to a military robot. How many times have you heard the word “posture” and almost unconsciously thrown your shoulders back? To create this statuesque ideal, most trainers aim to strengthen the posterior chain and stretch out the chest – i.e. strengthen the muscles that pull you back in space and stretch out the muscles that round you forward. READ MORE.