The muscles that are "tight" pull you out of alignment. You must stretch: Use a doorway stretch to open the chest.
Contrary to the "military-style" rigid upright position, modern physical therapy defines posture as a between your neurological and musculoskeletal systems. There is no single "perfect" posture; instead, healthy alignment is individualized and functional, focusing on how your body moves and adapts throughout the day. 2. Health Impact of Chronic Poor Posture overcoming poor posture pdf
The PDF includes printable weekly trackers with cues like “chin tuck after every email” and “hip stretch before lunch.” This behavioral component separates it from a simple list of exercises. The muscles that are "tight" pull you out of alignment