Exercise 3
Take a deep breath in, then exhale gently in a SSSSSS breathe (hissing like a snake). Work on keeping your exhalation a steady and constant stream for as long as you are able.
When you start to get the urge to breathe, try and continue exhaling just a little bit more before you have to breathe in.
Some people can manage just a few seconds, others can manage a minute or more.
Do what is right for you to begin with. Try timing yourself. Eg this week you managed 10 seconds, next week try for 11 seconds etc.