I can second this and saw the same benefits. However since I am going to the gym anyway, I add bench and overhead press too. That's it and I am out in less than

I can second this and saw the same benefits. However since I am going to the gym anyway, I add bench and overhead press too. That's it and I am out in less than an hour. I've had back problems since my early 30's (including surgery) and I knew my posture was poor but never was able to improve it until I started lifting. The key is that I don't think you can strengthen your posture muscles by holding the correct posture. You have to strengthen your posture muscles by lifting heavy objects on a weekly if not daily basis then you can easily hold correct posture. As the article mentioned the key is to flex the gluts to hold posture and the deadlift and squats are efficient ways to build glut strength. So in the end the reason why indigenous people don't have back problems is they are not sedentary and have stronger gluts.