Breathing Exercises for Anxiety and Panic Attacks

What is the best exercise for panic and anxiety attacks, as i sometimes find it hard to breathe from my diaphragm.

Matthew's reply: Hi Marie, please refer to other, similar posts in this thread regarding breathing exercises for anxiety and panic attacks. Actually, I remember you asked about anxiety and panic attacks before and I posted a reply in this thread - perhaps you missed it. If you have further questions feel free to post them. Regards, Matthew