We have all heard about the bad things that happen to our bodies as a result of sitting in a chair—slumped shoulders, collapsed ribcages, tight hip flexors, weak abs, etc. Yet, if you want to improve your flexibility, I recommend you sit down. However, instead of sitting on your soft, comfy couch with a tv remote in one hand, your assignment is to sit on the floor.
The typical armchair encourages you to pour yourself into the seat, completely disengaging your glutes and abs. Then, a pair of armrests beg you to round your shoulders forward and flare your elbows outward—all while collapsing your ribcage. With your ribcage collapsed, your breathing will be compromised. In this position, your head will jut in front of your shoulders, and stress will begin to creep into your neck.
Nothing about the “armchair seated position” resembles quality postural alignment.
Prior to the invention of these cushy posture-destroying chairs, human beings were forced to sit differently. If, after miles of walking, you decided to rest on the side of the trail, you probably would have looked to rest your buns on a rock. In this position, you still need to maintain control to keep from falling off the rock. You’ll probably need to sit with a relatively erect posture, while keeping your head over your shoulders. After all, you are simply resting your legs and not your entire body. The only time you are supposed to be completely relaxed is while lying down.
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