Use your mantra. Proceed respiration little by little and steadily through your nose as you begin to chant your mantra. You could say it out loud (this could aid more with mantras meant to make vibrations) or repeat it silently. It normally helps to match the mantra for your breathing. https://holivesheshsadhna04826.blogrelation.com/32500510/5-essential-elements-for-mantra