久坐低头，背总是挺不直？
这个视频教你一个简单动作，坐着就能练。
屈膝，臀部往前挪近脚跟，双手往后拉，头轻仰。保持几个呼吸，感受脊柱向上延伸。
每天几分钟，帮你的背自己立起来。
Can't keep your back straight after sitting all day?
This simple stretch can be done while sitting.
Bend your knees, move hips forward toward heels, reach hands back, and gently lift your head. Hold a few breaths. Feel your spine straighten.
A few minutes a day. Let your back straighten itself. http://t.cn/AXazstiC