The NASA 10-minute lean test explained: the protocol, why the wall helps, how to measure, and how to run it at home.
A 10-minute standing test that looks for an abnormal heart rate response to standing. You rest lying down, then lean against a wall while someone records heart rate and blood pressure. Clinics need only a wall and a monitor.
The wall takes work out of your legs, cuts movement, and lowers the chance of a fall if you feel faint. It also keeps your posture the same from test to test, so repeat results compare fairly.
The published criteria were built mostly on active standing and tilt testing. Your clinician decides how much weight a wall-supported result carries, so write down which stance you used.
LYING DOWN · MINUTE 1 OF 10
Lie flat, stay still and quiet.
Rest lying flat (protocols vary from 5 to 10 minutes; this guide uses 10), record resting heart rate and blood pressure, then lean and stay still for 10 minutes. Record at minutes 1, 2, 3, 5, 7 and 10.
In adults, POTS calls for a sustained rise of at least 30 bpm within 10 minutes of standing, or at least 40 for ages 12 to 19, without the blood pressure drop of orthostatic hypotension (Freeman 2011, CCS 2020, HRS 2015). Orthostatic hypotension means a fall of 20 mmHg systolic or 10 mmHg diastolic within 3 minutes of standing (Freeman 2011). Your doctor reads your rise alongside blood pressure, symptoms and history.
The home stand test guide covers setup and safety. The POTS app can time each phase and graph your heart rate.
Stand near something to hold, and sit down at the first sign of fainting. If you have fainted before, have someone with you.
This page informs and does not diagnose. Only a clinician who can examine you and see your whole history can interpret your numbers.
Want a record to bring to your visit? The POTS app guides the stand test at home and graphs your heart rate. See the app