No, you only naturally do it when you lie down. Normal the body do the minimum to save energy so you only use your lung on breathing. You need practice to get use to the use of abdominal muscles
-venus(处处闻啼鸟);
9-6(#16266628@0)
will try it at home.Thanks!
-walkonice(walkonice);
9-7(#16268614@0)+1
You are welcome! By the way, there was a typo, *Normally.
-venus(处处闻啼鸟);
9-8(#16269298@0)