How do i use breath training to breathe easier?

Practice: Breathing exercises help to breath easier, practice these execises 2-3 x daily try to do it whenever you can, then it becomes a part of it.

Which system?: "breath training" may describe anything from evidence-based techniques used in the treatment of people with chronic lung disease, to techniques for meditation in traditions such as yoga, to non-evidence-based promotions by misguided people. Exercise some discernment and see whether what is being offered is helpful.