What precautions should I take before taking a blood pressure measurement?

You should avoid bathing, drinking alcohol or caffeine, smoking, exercising, and eating for at least 30 minutes before taking a measurement. Rest for at least 5 minutes beforehand, sit in a comfortable chair with your back and arm supported, keep your feet flat and legs uncrossed, and ensure the arm cuff is at heart level. Remain still and do not talk during the measurement, and ensure no electrical device is within 12 inches (30 cm) of the monitor. (Pages 21, 24)