Holistic Install #051: Standing Changes The Signal

“Dizzy” is a feeling. “Dizzy after I stand” is a pattern.

A new JAMA review on POTS shows why one small piece of context can change a health talk.

Today’s mental model: position is a switch, not just a location.

Today’s install is a Position Log. It takes 10 minutes to build. Print a few copies for your health binder.

On August 24, 2026, JAMA published a review of postural orthostatic tachycardia syndrome, or POTS.

POTS is a disorder of the body’s automatic control system. Common symptoms can include lightheadedness, a fast or pounding heart, fatigue, brain fog, stomach trouble, poor sleep, and trouble with exercise.

The review says POTS may affect about 0.1% to 1% of the U.S. population, though the true number is not clear. In one survey of 4,835 patients, the middle diagnostic delay was 24 months.

Doctors do not diagnose POTS from one symptom or a home note. They look for a set heart-rate change with standing or a tilt test, chronic symptoms, and no other cause. Other problems, including anemia, dehydration, thyroid disease, lung or heart disease, and medicine effects, must be checked.

The household lesson is not to test or treat yourself. It is to stop stripping away the setting.

“I felt weak” is hard to use. “I felt weak two minutes after standing in a hot kitchen, and it eased when I sat” gives a clinician more to work with.

In 1962, America was still learning what space could do to the body. A Mercury astronaut returned from a nine-hour flight. NASA later marked that mission era as the first report of trouble staying upright after space flight.

In orbit, the body does not have to fight gravity in the usual way. Fluids shift. The heart and blood vessels work under a new load. When an astronaut comes home, standing becomes a fresh test.

NASA kept studying the problem. After nine Spacelab Life Sciences missions that lasted from nine to 14 days, 64% of astronauts had orthostatic intolerance. In an early report after long stays on the International Space Station, five of six astronauts could not complete a post-flight stand test in the usual way.

The astronauts were highly trained. The problem was not weak will. The setting had changed the body’s control loop.

NASA built tests that could make blood pressure respond as if a person were standing even while still in space. The goal was to spot who might need extra steps before landing.

POTS on Earth is not the same as post-flight trouble in astronauts. The causes and care are different. But NASA’s story gives us a clean idea: a body reading means more when we know the load placed on the body.

Sitting, standing, heat, time, food, and recent illness are not side notes. They can be part of the signal.

Around the third century CE, during the late Han and early Jin world, the physician Wang Shuhe gathered older pulse teachings into the Mai Jing, or Pulse Classic.

People had felt the pulse for centuries. Wang’s move was to sort the observations. Later histories credit his book with describing 24 pulse types. The work also helped organize pulse checks at named places on the wrist.

Imagine the problem. A pulse lasts for a moment. One healer feels it, then removes a hand. Without common words and places, the finding can vanish with the touch.

The Pulse Classic tried to make that short event repeatable enough to teach. It was not modern heart science. Many old meanings tied to the pulse do not match current evidence. Yet the record-making move was powerful.

Wang treated context and position as part of the observation. He did not reduce the whole person to one loose word like “bad.” He tried to say where, how, and under what pattern the pulse was felt.

Modern medicine has tools Wang could not imagine. It can measure heart rhythm, pressure, blood, hormones, and more. Still, the first clue often begins in plain language.

The ancient lesson is not to copy old diagnosis. It is to copy the discipline: name the place, the time, and the change.

Across BOTH examples, the pattern is this: a body signal becomes more useful when you record what changed around it.

A symptom is not a verdict. It is a clue. Give the clue a setting before you give it a story.

Time: 10 minutes to build. Cost: free.

Measurable win: one symptom described with five useful facts instead of one vague word.

If you faint, have chest pain, trouble breathing, new weakness, or a severe new symptom, seek urgent medical help. Do not change salt, fluids, compression, exercise, or medicine for possible POTS without a clinician who knows your health.

□ Five columns drawn

□ Position words added

□ Trigger list added

□ No forced home test planned

□ Page stored with health notes

A paper card is enough. Use your phone notes if that is easier. The tool only needs to capture time, position, symptom, length, and what came before.

The body is a system. Position can change the load. A good note helps you see the loop.

Be well,
Nick Anderson

Today’s lesson: context can turn a loose symptom into a useful question.

P.S. Which setting is hardest on your energy: standing in the kitchen, a hot shower, a long line, or a walk after a meal? Hit reply and tell me. Forward this to someone who keeps saying, “It happens at random.”

P.P.S. Two useful next reads:

Sources reviewed for this issue: JAMA review of POTS, August 24, 2026; NASA history of post-flight orthostatic intolerance; NIH-indexed history of pulse science and the Pulse Classic.