That shows that nearly every muscle in our body is belonging/ connected to the breathing muscles and thats why its good to have a special kind of massage for all that muscles as early as possible.
I did start to get regularly massages about 10 years ago, when my muscles were already shortened and hardened from the coughing. I could imagine that its better to start with it as early as possible so you will feel better when growing older...
Uli,44,Germany