With prāṇāyāma practiced correctly, all diseases are destroyed. With incorrect practice, all diseases arise.

This verse is a crucial warning that serves as a transition toward the second chapter on prāṇāyāma. It establishes the principle that yogic techniques are powerful in both directions.

Yuktena — “correctly” or “appropriately.” Correct practice implies:

• Instruction from a qualified teacher
• Gradual and systematic progression
• Attention to the body’s signals
• Respect for prescribed proportions and timings

Ayuktābhyāsa — “incorrect practice.” Errors may include:

• Forcing beyond current capacity
• Excessively long retentions without preparation
• Ignoring contraindications
• Practicing with ego or haste

Sarva-roga-samudgamaḥ — “all diseases arise.” This is not rhetorical exaggeration. Incorrect prāṇāyāma can cause:

• Nervous imbalances
• Heart problems
• Mental disorders
• Lung damage

This verse is a reminder that Haṭha Yoga requires seriousness, patience, and proper guidance.