How to prevent turtle neck while sitting in a chair

pu1. There's a good way lol It's known as a way to train your thighs, but it also has an excellent effect on your turtle neck. You'll know when you try, but keep your neck in the right position without falling forward. If you don't pay attention, you'll run out of books, so you have to pay attention.
The way is simple. You just need to keep the book between your thighs and knees in a low position

2017-12-03

OK