Support your arm so the middle of an upper-arm cuff is at heart level. The position of the cuff matters more than whether your hand happens to point toward your chest.
Sit beside a table and rest your forearm on it. Keep your shoulder relaxed rather than holding your arm up with muscle effort. If the surface is too low, a cushion can help bring the cuff to the appropriate height. Follow the monitor's instructions for cuff placement on bare skin.
An illustrative note might say: “Seated at the kitchen table, arm supported.” If you change your setup between readings, keep that context rather than assuming any difference represents a lasting change in blood pressure.
A common mistake is lifting the hand while leaving the cuff much lower. Another is reading instructions for a wrist monitor as if they described an upper-arm device. Ask a healthcare professional to check your technique if the position remains unclear.
Sit in your measuring chair and place your forearm on a stable support.
Check the height of the middle of the cuff, not just your hand.
Relax the shoulder. If you are holding the arm up, adjust the support.
Keep that setup for the planned session. If it is uncomfortable, ask for an adapted position.
A useful setup note is: “Chair and table used: __; arm supported on: __; cuff position checked: __.” This is a record of conditions, not a score for whether the result is valid.
The ARMS randomized crossover trial compared supported desk-level measurements with an arm resting on the lap and an unsupported arm at the side. In 133 adults, the latter two positions produced higher average readings. This supports paying attention to both support and height. It does not provide a correction formula for your own measurements, and the trial does not establish instructions for every type of wrist device.
If your usual setup changes, record the change and restore a consistent position for future planned sessions. Do not subtract a study's average difference from an individual result. A clinician can help you adapt the position if pain, mobility limitations or furniture make the usual setup impractical.
Read the guidance and research behind this article.
Updated 2026-11-12
