At any age, how you sit can have a huge impact on how you feel and how well your body works. And remember what you do today will make it easier to do the same thing tomorrow.
Your body will adapt both in terms of sarcomerogenesis ,fascial adhesions, bone deformation and organ placement. That is a gift your body performs, if you aren't going to use it, your body gets rid of it (wasteful).
How you don't Want to Practice Sitting.