Do you need a 90 degrees knee angle to have an ideal sitting posture? It depends on your chair!

You all heard it: to sit well, sit with your knees at a right angle... I sometimes agree, but it's not black or white! In this video, I will show you how to find the best height for your chair, depending on what you feel in your hip joint and in your heels. I will also explain about the HAG Capisco and why it contradicts the 90° angle in the knees dogma. As always, I will dive deep into biomechanics, posture and ergonomics, debunk complexity and empower you to correct your posture without a useless posture corrector, dogmas or expensive items. Follow the guide, and get rid of your lower back pain... Back pain, neck tension, shoulder strain, or wrist discomfort — most of these are cumulative issues caused by poor posture, inefficient ergonomics, and lack of targeted movement. This channel exists to help you understand your body and take back control through practical, science-based self-care strategies. You’ll learn how to: fix posture-related back pain at the root, apply neck pain relief strategies at home or in the office, and build your own ergonomic self-care routine — no gadgets or ongoing therapy required. Want to go further? 🔹 THE POSTURE MANUAL – My best-selling self-help book includes 15 exclusive reader-only videos. Available only through my official site: 👉 https://oliviergirard.ch/en 🔹 THE POSTURE ACADEMY – Join my most comprehensive online posture program, with lifetime access to a private support group and optional personal coaching. 👉 https://oliviergirard.ch/en/posture-a... 📚 Visit the webshop to browse all my resources in one place — including books, video programs, and downloads to help you become your own posture expert: 👉 https://oliviergirard.ch/en/shop ⚖️ Medical Disclaimer The content shared in this video is for educational purposes only and is not intended as a substitute for professional medical advice, diagnosis, or treatment. Always consult with a licensed healthcare provider regarding any medical concerns or conditions. 📄 Full disclaimer: https://oliviergirard.ch/en/ytdisclaimer