Sudarshan Kriya is a cyclical, wave‑like breathing practice that blends slow, medium and fast rhythms to shift nervous system tone, mood, and clarity. The numeric shorthand "20 40 40" generally refers to a structured sequence of breaths or timing segments used in audio-guided sessions: a preparatory phase (~20 breaths or seconds), a central balancing phase (~40 breaths/seconds) and an energizing or integration phase (~40 breaths/seconds). When rendered as an audio track, those numbers become the scaffolding that guides attention, physiological pacing, and emotional arc.