Exercise 1.
Take a deep breath, fully expanding your diaphragm. Count: one, two, three, four, five. Then relax, exhale all of the air through your mouth. Draw your stomach inward, pulling it up as if you want to hide it under your ribs. Hold your breath. Count: one, two, three. Take a breath again, repeating the exercise the same number of times as your age. E.g. If you're 51, do the exercise 51 times.