I struggled for ages with trying to keep "good posture", trying to position each part of my body correctly (shoulders back, etc). Once the importance of core m

I struggled for ages with trying to keep "good posture", trying to position each part of my body correctly (shoulders back, etc). Once the importance of core muscles was pointed out to me, I saw that all I need to do was "turn on" my pelvic muscles and the other bits of my body fell into place without thinking about them individually. As the strength of these muscles improved due to a regular exercise routine, I found that I didn't have to consciously "turn on" pelvic muscles and they were strong enough to keep things in position by themselves.