Safety first
On scuba, breathe naturally and continuously as trained; never hold, skip or deliberately restrict your breathing. Keep attention on your buddy, buoyancy, gas and surroundings. Leave optional exercises out of descents, ascents and any demanding task.
Keep every practice within your training, agency standards and dive plan. Emergency procedures take priority. Anyone may decline a practice or end a dive. This is education, not therapy, medical clearance or agency endorsement.
Practise breathing exercises on dry land, in a safe place, without forced ventilation or breath-holds. Stop if uncomfortable or dizzy. Do not use intense breathwork to prepare for immersion. No fixed waiting interval makes it safe. Underwater, follow the shared scuba guidance.
Practice and professional scope
Complete the learning and assessments, then check your course's water verification, practicum and approval requirements. A completion record and professional teaching authority are different outcomes.