Will I need to do anything to prepare for the tests?To prepare for a lung function test, you'll need to take some steps to ensure your breathing is normal and unrestricted. These include:Don't eat a heavy meal before the test.Avoid food or drinks with caffeine.Don't smoke or do heavy exercise for six hours before the test.Wear loose, comfortable clothing.If you wear dentures, you'll need to wear them during the test. They can help you form a tight seal around the mouthpiece.
