TASMIN SATI SHVASA PRASHVASYOR GATI VICHCHHEDAH PRANAYAMAH ||49||

तस्मिन् सति श्वासप्रश्वास्योर्गतिविच्छेदः प्राणायामः ॥४९॥

tasmin sati śvāsa-praśvāsyor-gati-vicchedaḥ prāṇāyāmaḥ ||49||

Once harmony with the physical body has been achieved, through interruption of the movement engendered by inhaling and exhaling you attempt to harmonize your energy (pranayama). ||49||


tasmin = after this; after asana
sati = being accomplished
śvāsa = inhaling 
praśvāsyoḥ = (from praśvāsa) exhaling 
gati = movement 
vicchedaḥ = (nom from viccheda) interruption; braking; ceasing; mastering 
prāṇa = life force; life energy
yāma = bind; regulate 
āyāma = release; liberate 
prāṇāyāmaḥ = (nom. from prāṇāyāma) harmony with life energy; yoga breathing excercises