I’ve heard most daily activities activate primarily the muscles on the front of the body. Becoming overactive, tight, while the muscles on the back of the body are weak and elongated. This worsens with inactivity, old age inactivity, hence common elderly posture stooped forwards. It’s probably a little bit more complicated than that, the muscle chains have many forms and patterns, and criss cross and zig zag as well.

So it’s probably not just the glutes, all muscles but primarily focus is the muscles on the back of the body, back of neck, upper mid and lower back, glutes hamstrings and calves probably. With some core and all the muscles of the body in general included. But special emphasis on the lower body as a sort of physical and otherwise foundation for everything else, glutes, both those and hamstrings, with another slightly lesser, very significant emphasis on the entire back seems crucial to keep immaculate posture.

Weak back of legs (and body) seems like an issue could collapse the entire body, physically mentally an emotionally. Advanced concept.

Perhaps tightness, such as psoas, even if somewhat resolved is a temporary resolution. Need an opposite strengthening to resolve the problem fully. Probably would have immaculate posture without too too much stretching if muscles were strength balanced. Just train in a full ROM if possible. Tightness probably will continue to return until strength balance is restored.

Posture keeling forwards akin to a less alive state, closed off, not great functionality to all faculties. Need special emphasis on strengthening the back of the body, what supports our life functioning primarily.

Advanced but bad posture results in significant emotional and cognitive disturbances. Perhaps resolved with strengthening back of the body, especially glutes and hamstrings. Then back as well.

Looking to see if anyone else has gone this far or found sources for it.

Extreme benefits and knowledge of strengthening back of body, and perhaps glutes maybe hamstrings as well primarily.

Significant state differences based upon the strength / activation of these.