Greg Smith 
Purposeful Breathing [PDF ebook] 
Reset Your Mind * Improve Your Energy * Enhance Your Health

Purposeful Breathing is a practical, user-friendly guide to simple breathing skills that can rapidly reduce states you don’t want and increase states you do want. For anyone suffering from anxiety, feeling calmer can happen in a breath or two. For anyone wanting to boost performance, the right breathing skills will help them to get into ’the zone’. The book also teaches breathing skills for longer term health and healing, informed by new discoveries from psychology and neuroscience.