Regular exercise does not make the lungs bigger, but it makes your whole breathing system work better. Workouts strengthen the muscles that help you breathe, improve how well your body uses oxygen and help you do more with less breathlessness. Aerobic activities such as brisk walking, cycling, swimming and jogging are especially helpful, and exercise can also help people with asthma or COPD manage their symptoms better when done under medical guidance. It cannot undo serious lung damage, so quitting smoking and avoiding polluted air still matter. On high-pollution days, prefer indoor workouts. If you feel unusual breathlessness, chest tightness, wheezing or dizziness while exercising, stop and see a doctor. People with lung or heart conditions should check with their doctor before starting a new routine.
