Lesson 1: First Principle - Pelvis Position
For the perfect posture, the correct pelvis and hip position is crucial. Make sure that your pelvis and hip never fall back and produce a hollow back. Otherwise, it will cause you back pain and make you look shorter. You always want to maximize the length of your body.
To help achieve the correct pelvis and hip position, practice the additional Exercise No. 6: Flamant and Exercise No. 7: Grenouille in Module 5: Exercises - Get in Your Best Shape.