We breathe all day every day so we may as well learn how to breathe correctly. Over-breathing can be the source of many health concerns and helped by learning how to breath in accordance to normal physiology. Breath re-training is all about re-setting the breathing centre in your brain.
Breath focused physiotherapy
If you find it difficult to breathe whether it be during exercise, during yoga or generally feeling restricted in the muscles in neck/trunk perhaps some soft tissue work focused on improving breath is what you need?