In the inferior stage, perspiration appears; in the middle stage, there is trembling; in the superior stage, steadiness is attained; then one should firmly retain the breath.

This verse describes the three levels of achievement in prāṇāyāma, identifiable by specific physical signs. In the initial stage (kanīyasi), the practitioner experiences perspiration (sveda) due to the heat generated by the practice.

In the intermediate stage (madhyama), trembling (kampa) appears. This trembling is not pathological but a sign that prāṇa is being intensely mobilized through the nervous system. The nāḍīs are being purified and may produce involuntary shaking.

In the superior stage (uttama), sthāna — complete steadiness — is attained. The body remains motionless, the mind tranquil, and prāṇa flows without obstruction. It is in this state that the practitioner can retain the breath (vāyuṃ nibandhayet) for extended periods without effort or discomfort. This progression may take months or years of constant practice.