Health tracking has a helpful dose, and past it, checking feeds worry

Key takeaways

• In 28 lab experiments with 1,662 people, checking the same thing over and over sharply lowered confidence in memory, while actual accuracy dropped only a little.
• A 2019 review of 20 studies found that people with more health anxiety search online for health information more, and the link with distressing, repeated searching was much stronger.
• Two 2025 reviews found that people who use diet and fitness apps report more disordered-eating symptoms, but neither could show that the apps cause eating problems.
• For home blood pressure, the American Heart Association advises two readings one minute apart at the same time each day, and three days of morning and evening readings gave a reliable average in one study.
• If logging food or weight starts running your life, call the National Alliance for Eating Disorders helpline at 1-866-662-1235; in a crisis, call or text 988.

In 2003, two Dutch psychologists sat healthy volunteers in front of a computer animation of a gas stove¹. One group checked the virtual stove again and again. A comparison group checked virtual light bulbs instead, a task with nothing at stake¹.

Checking the stove didn’t make people forget. Their memory of what they had done stayed just as accurate¹. But their memories turned fuzzy and less detailed, and their confidence in their own memory fell¹.

That odd result has held up. In 2019, a review pooled 28 of these experiments with 1,662 people². Repeated checking caused large drops in confidence, vividness and detail, plus a small drop in actual accuracy².

The researchers were studying checking of the kind seen in obsessive-compulsive disorder. But anyone who has rechecked a pulse, a scale or a symptom search may know the pattern.

You check to feel sure, the relief lasts a moment, and then the doubt returns.

Our article on goal tracking showed that monitoring helps people reach health goals. This one covers the other side: monitoring has a helpful dose and a harmful one.

Why checking more can leave you less sure

Psychologists call a habit meant to head off a feared outcome a “safety behavior”³⁴. Rechecking a lock is one, and rechecking your body can be another.

A 2021 review from researchers in Mainz, Germany, argued that web searching works this way for people with health anxiety³. Relief comes some of the time but not every time, a pattern called intermittent reinforcement, and that keeps the habit alive³.

The gas-stove studies suggest a second reason. The Dutch team proposed that each look makes the scene more familiar, so attention slides past the details. A thin, faded memory is easy to doubt, and doubt is exactly what the next check promises to fix¹.

Those were lab tasks, not health habits, so the link to body checking is a reasonable inference, not proof. Still, in a Swedish trial for severe health anxiety, the treatment that worked best asked people to stop checking their pulse and to hold off on seeking medical reassurance⁴.

Seven signs your monitoring has passed the helpful dose

Tracking at a healthy dose answers a question and then gets out of the way, while over-monitoring keeps asking. These signs suggest you’ve crossed the line:

• Relief doesn’t last. A check calms you for minutes, and then you feel pulled to check again.
• You check far more than your plan calls for. Think five blood pressure readings before lunch, or several weigh-ins a day.
• Your sleep got worse after you started tracking it. Our article on sleep trackers covers orthosomnia, the drive for perfect sleep data.
• Your list of foods keeps shrinking. Foods get dropped because they are hard to log, not because they disagree with you.
• Normal ups and downs alarm you. Our articles on glucose sensors and lab ranges explain why most after-meal rises and slightly flagged results are normal.
• Missing data feels risky. You skip a walk because your watch is charging.
• The number outranks your body. You wake up rested, a score says you’re not, and you believe the score.

None of these means something is wrong with you; they mean a tool now costs more than it gives.

Symptom searching and health anxiety feed each other

In 2019, Australian researchers pooled 20 studies with 7,373 people and found that those with more health anxiety did more online health searching⁵.

The researchers measured this with a correlation, a number from 0 (no link) to 1 (a perfect match). For health anxiety and online searching, it was 0.34, a moderate link⁵. For health anxiety and cyberchondria, it was much stronger, 0.62⁵.

The German review in 2021 pooled 7 studies with 3,069 people and found almost the same figure, 0.63³. It also tied cyberchondria to obsessive-compulsive symptoms and to trouble living with uncertainty³.

A correlation can’t show which comes first: worry may drive searching, or searching may feed worry. The German team argued that each feeds the other in a loop³. The Australian team noted a weak spot: most studies relied on a single questionnaire to measure cyberchondria⁵.

A search with a clear question and a stopping point can help you prepare for a visit. Trouble starts when the search has no end.

Calorie and fitness apps: a steady link, an unproven cause

In a 2017 study of 105 people treated at a community eating-disorder clinic, about three in four had used MyFitnessPal to count calories⁶. Of those, 73% said the app had contributed at least somewhat to their eating disorder, and 30% said it had contributed very much⁶. Those were memories reported after the fact, so they can’t prove cause⁶.

Two research teams pulled together the wider evidence in 2025.

The first, from a University of Edinburgh team, gathered 27 studies⁷. The one-time surveys among them told a fairly steady story: people who used trackers reported more restrictive dieting, more driven exercise, more muscle-building fixation and more disordered eating overall⁷. The experiments told a different one. There, the link didn’t appear, so the team called trackers a correlate of eating problems, with cause and direction still unknown⁷.

A second review, from Flinders University in Australia, covered 38 articles⁸. Young adults who used diet and fitness apps showed more disordered eating than those who didn’t, and the gap held for frequent users too⁸. In studies that asked users about their experiences, people described pressure to hit goals and feelings of guilt⁸. It, too, could not show cause⁸.

Apps may push some people toward rigid eating, or people already struggling may be drawn to apps. Both may be true. Either way, if you have an eating-disorder history or feel driven by your log, the app deserves caution.

The scale is fine for many people and hard on some

In 2016, a team including University of Sheffield psychologists pooled 29 tests of self-weighing and mental health⁹. Overall, weighing wasn’t linked with anxiety or depression, body image or disordered eating⁹. It had a small negative link with measures such as self-esteem, and the authors noted the picture may be worse in some circumstances than others⁹.

A 2015 review by University of Minnesota researchers looked at 20 articles and found a split¹⁰. Negative links showed up mainly among women and younger people. Adults with overweight who were in weight-loss treatment showed no link or a helpful one¹⁰.

The authors added that no one knows whether the good results in programs come from the weighing or the weight loss¹⁰.

So the scale looks low-risk for many adults in a structured program. For a teenager, a young woman with body worries or anyone with an eating-disorder history, it deserves a conversation with a clinician first.

Blood pressure and heart alerts: follow a schedule, not a worry

Home blood pressure is one of the most useful things to track if you have high blood pressure or are close to it. It also invites rechecking, because readings jump around.

The American Heart Association’s home routine, last reviewed in August 2025, fits on an index card¹¹:

• When: the same time every day, on the schedule your clinician sets.
• Before: use the bathroom, and give up coffee, cigarettes and workouts for the prior half hour.
• Setup: rest quietly for five minutes or more, cuff on bare skin, arm resting at heart height.
• Readings: two of them, a minute apart, both written down.

One high number on its own isn’t an emergency, according to the AHA. Measure again, log it and let your clinician know¹¹. If you see 180/120 or higher, wait at least a minute and recheck; if it stays that high, call your clinician at once¹¹. Call 911 instead if a reading that high comes with chest or back pain, trouble breathing, numbness or weakness, a change in vision or difficulty speaking¹¹.

You don’t need dozens of readings for a good picture. In a 2022 study of 567 adults by researchers in the Netherlands and at the University of Oxford, morning and evening readings for three days gave a reliable average¹². (Each “reading” was the monitor’s average of three quick measurements.) A firm diagnosis of high blood pressure took about four and a half days¹².

In that study, the first readings tended to be the highest, and numbers drifted down over time¹². An early high number is a reason to keep to the schedule, not a reason to panic.

Watch alerts can stir the same cycle. In a 2024 study of 172 people with atrial fibrillation (an irregular heart rhythm), wearable users were more preoccupied with their symptoms¹³. One in five users felt anxious after irregular-rhythm alerts and always contacted their doctor¹³. Our smartwatch alerts article covers what those alerts can tell you.

Never stop or change blood pressure medicine based on home readings without talking to your clinician¹¹.

A scale-back plan that puts your body first

Many people drawn to natural health value listening to the body: hunger, energy, mood, how a walk or a meal feels. That’s a skill, and no device replaces it. Numbers can sharpen it, but in the heart-rhythm study, more data came with more worry, not more peace¹³.

The frequencies below are starting points built from the guidance above, not tested prescriptions. Adjust them with your clinician.

What you track	A healthier dose	Take a break if	Try this instead
Blood pressure	Two readings at the same time daily, on the days your clinician asks for	You measure again and again after a high number	Rest five minutes, take one more reading, write it down, put the cuff away
Weight	Once a week, same day and time	You skip meals or feel panic after weighing	Notice how clothes fit, your energy and your strength
Calories or food logs	A one- or two-week learning stretch, or log one habit such as vegetables at lunch	Foods vanish because they’re hard to log, or you feel guilt	Use a simple plate pattern and a hunger-and-fullness check
Steps and workouts	Look at the weekly total	You push through illness or injury to close a ring	Take some walks with the watch left at home
Sleep scores	Check a weekly average, not each night	Your sleep got worse after you started tracking	Judge by how you feel at 10 a.m.
Symptom searches	One search, one trusted source, one clear question	You search the same symptom three or more times	Write the question down for your next visit

Then try these steps:

1. Count for three days. Make a tally mark each time you check a number, app or symptom.
2. Pick your keepers. Keep one or two numbers that answer a real question, such as whether a medicine is working.
3. Set check times. Outside those times, the device stays in a drawer or the app stays closed.
4. Turn off nonessential alerts. Move tracking apps off your home screen.
5. Delay and notice. When the urge to check hits, write it down and wait, the same skill the Swedish therapy trained⁴. See whether the urge passes.
6. Take a data holiday. Go one week without your least useful tracker, then ask whether you miss it.

Sometimes the most self-reliant choice is to put the device down and trust what you notice.

What the evidence shows

Claim	Evidence rating	What it rests on
Repeated checking lowers confidence in memory	Strong evidence	28 lab experiments with 1,662 people; accuracy dipped only slightly2
Repeated body or health checking works the same way	Promising but early	Inference from lab tasks12 plus a health-anxiety model3
Health anxiety goes with more symptom searching and cyberchondria	Strong evidence	Two reviews with consistent links; cause and direction unclear35
In surveys, diet and fitness app users report more disordered-eating symptoms	Strong evidence	Two 2025 reviews of 27 and 38 studies, mostly one-time surveys78
Tracking apps cause eating disorders	Not enough evidence	Experiments haven’t found the link7
Self-weighing harms most adults’ mental health	Evidence says no	29 tests found no link with mood, body image or disordered eating9
Self-weighing can hurt some younger people and women	Promising but early	Mixed results across 20 articles10
A few days of scheduled home readings give a reliable blood pressure average	Promising but early	One study of 567 adults12, consistent with AHA advice11
Exposure-based CBT eases severe health anxiety	Strong evidence	A randomized trial of 158 adults and earlier trials it summarizes4

When to get help

Over-monitoring can be part of something that needs care. Talk with a clinician or counselor if:

• You have cut out meals or whole food groups because of what your log says.
• You feel panic when you can’t weigh, log or check.
• You exercise through illness or injury to hit a target.
• Doctor visits or tests reassure you only briefly before the worry returns.
• You avoid medical care because you fear what a test might show.
• Checking eats up time you’d rather spend on work, family or rest.

Health anxiety responds to treatment. In the Swedish trial, 158 adults with severe health anxiety took a 12-week online program guided by a therapist⁴. Both programs helped, and exposure-based cognitive behavioral therapy (CBT), a talk therapy that works on thoughts and habits together, helped more⁴. Gains held at six months⁴.

For food, weight or exercise worries, the National Alliance for Eating Disorders helpline is 1-866-662-1235¹⁴. It isn’t a crisis line, but it connects callers with licensed therapists who specialize in eating disorders and can refer you to care, weekdays from 9 a.m. to 7 p.m. Eastern¹⁴.

If you’re in distress or thinking about harming yourself, call or text 988, or chat at chat.988lifeline.org¹⁵. It’s free, confidential and open 24 hours a day¹⁵. For a blood pressure over 180/120 with warning symptoms, call 911¹¹.

Questions readers ask

The bottom line

Monitoring works like many good things: the right amount helps and too much backfires. In the lab, checking again and again leaves people less sure. In daily life, heavy checking travels with health anxiety, rigid eating and worry over normal ups and downs.

Keep the numbers that answer a real question, check them on a schedule and let your body’s own signals count. If checking starts running your days, reach out for help. That isn’t failure. It’s the same self-awareness that led you to track in the first place.

Related reading

• Tracking your progress works best when you write it down and tell someone
• Sleep trackers count your hours well, but their sleep stages are rough guesses
• Glucose sensors catch every spike, and in healthy people most spikes are normal
• Why being out of range often means nothing at all
• Smartwatch health alerts are better at warning you than reassuring you

Sources

1. van den Hout M, Kindt M. “Repeated Checking Causes Memory Distrust.” Behaviour Research and Therapy, 2003;41(3):301-316. research-portal.uu.nl
2. van den Hout MA, van Dis EAM, van Woudenberg C, van de Groep IH. “OCD-Like Checking in the Lab: A Meta-Analysis and Improvement of an Experimental Paradigm.” Journal of Obsessive-Compulsive and Related Disorders, 2019;20:39-49. research-portal.uu.nl
3. Schenkel SK, Jungmann SM, Gropalis M, Witthöft M. “Conceptualizations of Cyberchondria and Relations to the Anxiety Spectrum: Systematic Review and Meta-analysis.” Journal of Medical Internet Research, 2021. bibliographie.ub.uni-mainz.de
4. Hedman E, Axelsson E, Görling A, et al. “Internet-Delivered Exposure-Based Cognitive-Behavioural Therapy and Behavioural Stress Management for Severe Health Anxiety: Randomised Controlled Trial.” British Journal of Psychiatry, 2014;205(4):307-314. cambridge.org
5. McMullan RD, Berle D, Arnáez S, Starcevic V. “The Relationships Between Health Anxiety, Online Health Information Seeking, and Cyberchondria: Systematic Review and Meta-Analysis.” Journal of Affective Disorders, 2019;245:270-278. researchers.mq.edu.au
6. Levinson CA, Fewell L, Brosof LC. “My Fitness Pal Calorie Tracker Usage in the Eating Disorders.” Eating Behaviors, 2017;27:14-16. pmc.ncbi.nlm.nih.gov
7. Moody S, Ross L, Opitz M-C, et al. “Associations Between the Use of Fitness and Diet Tracking Technology and Disordered Eating Behaviour: A Systematic Review.” European Eating Disorders Review, 2025;33(6):1288-1313. research.ed.ac.uk
8. Anderberg I, Kemps E, Prichard I. “The Link Between the Use of Diet and Fitness Monitoring Apps, Body Image and Disordered Eating Symptomology: A Systematic Review.” Body Image, 2025;52:101836. researchnow.flinders.edu.au
9. Benn Y, Webb TL, Chang BPI, Harkin B. “What Is the Psychological Impact of Self-Weighing? A Meta-Analysis.” Health Psychology Review, 2016;10(2):187-203. eprints.whiterose.ac.uk
10. Pacanowski CR, Linde JA, Neumark-Sztainer D. “Self-Weighing: Helpful or Harmful for Psychological Well-Being? A Review of the Literature.” Current Obesity Reports, 2015;4:65-72. link.springer.com
11. American Heart Association. “Monitoring Your Blood Pressure at Home.” Last reviewed August 14, 2025. heart.org
12. Groenland EH, Bots ML, Visseren FLJ, McManus RJ, Spiering W. “Number of Measurement Days Needed for Obtaining a Reliable Estimate of Home Blood Pressure and Hypertension Status.” Blood Pressure, 2022;31(1):100-108. researchinformation.umcutrecht.nl
13. Rosman L, Lampert R, Zhuo S, et al. “Wearable Devices, Health Care Use, and Psychological Well-Being in Patients With Atrial Fibrillation.” Journal of the American Heart Association, 2024;13(15). pubmed.ncbi.nlm.nih.gov
14. National Alliance for Eating Disorders. Helpline information (homepage). Accessed October 2026. allianceforeatingdisorders.com
15. 988 Suicide & Crisis Lifeline. “988 Suicide & Crisis Lifeline.” Accessed October 2026. 988lifeline.org