You must breathe from the stomach! With your shoulders level! And make sure your back is straight!
11 seconds sound clip from the Mystery of Chess Boxing movie soundboard.
You can hear this line at 00:54:55 in the DVD version of the movie.
Quote context
[...]
- Damn you! You'll never get married!
- Now then, half strength is not enough. Stand still. Belly in!
- You must breathe from the stomach! With your shoulders level! And make sure your back is straight!
- Left wrist! Right wrist! Left wrist, right wrist!
- Now these methods improve your arm strength! Now you try them while I watch.
- I found you. All these years and you've not changed a bit!
[...]