AHA Guide for Blood Pressure (heart.org):
A difference of greater than 10 mm Hg between right and left arm signifies an increased risk of cardiovascular disease.
ACE Guidelines for Body Composition
Please note: bioelectrical impedance (using a scale or handheld device) is relatively precise but not extremely accurate. In other words, don’t dwell on your specific classification. It’s more important to pay attention to relative changes over time as these reliably indicate improvements in body composition and reduction of risk factors for disease.
ACE Waist-to-Hip Ratio