7 blood pressure mistakes that could be throwing off your readings

Several key mistakes could throw off the accuracy of blood pressure readings for people who take them at home.

The average "normal" blood pressure is 120/80, according to the American Heart Association.

Almost half of all U.S. adults have elevated blood pressure (systolic pressure between 120 and 19 and diastolic pressure less than 80). High blood pressure (hypertension, which is when the systolic pressure is between 130 and 139 or diastolic pressure is between 80 and 89) can raise...