Proper preparation ensures accurate results. For optimal test results, wear comfortable clothing and shoes to facilitate ease during the procedure. Maintain your prescribed medication regimen unless explicitly directed otherwise by your doctor. It is crucial to abstain from smoking or consuming alcohol before the test, as these substances can significantly impact the accuracy of the results. If you utilize an inhaler, consult your physician to ascertain the appropriate time to discontinue its use before the test. Furthermore, avoid consuming a heavy meal at least two hours before the test, and refrain from exercising for at least 30 minutes beforehand.
Doctors may advise against the test if you have recently undergone eye surgery, abdominal surgery, a heart attack, or have an active respiratory infection.