In the case of approaching, the bent side is used. The raised side is used when moving backward. The stretched side is used in joy and similar expressions. The turned side is used while turning around. These are the uses of the sides in movement.
क्षामं खल्वं च पूर्णं च सम्प्रोक्तमुदरं त्रिधा । तनु क्षामं नतं खल्वं पूर्णमाध्मातमुच्यते ॥ २४३॥
The belly is described as being of three types: Kṣāma (thin), Khalva (depressed), and Pūrṇa (full). The thin belly is called Kṣāma, the bent one is called Khalva, and the full belly is referred to as Pūrṇa.
The thin belly (Kṣāma) is used in laughter, weeping, exhaling, yawning, in sickness, penance, weariness, and hunger. The depressed belly (Khalva) is used in these contexts.
The full belly (Pūrṇa) is used in deep breathing, corpulence, disease, excessive eating, and similar conditions. Now listen to the actions of the waist.