Pediatric Pedometer (Step Counter): Uses, Types, Safety and Step-by-Step Guide

Pediatric Pedometer: Step Counter Guide for Children

A pedometer is a small wearable device that counts steps. A pediatric pedometer, also called a step counter for children, records how many steps a child takes during the day. This gives a simple number for tracking physical activity, comparing one day with another, and setting realistic activity goals.

This guide explains how a pedometer for children works, the main types, correct use, safety points, how to read step counts, and the limits of the device. It is written in plain language for any reader who wants clear, practical information about children's step counters.

Introduction: Why a Pedometer for Children Is Useful

Regular physical activity supports healthy growth, strong bones and muscles, heart and lung fitness, sleep, and emotional well-being in children. Health organizations around the world recommend daily activity for every age group. Surveys from many countries show that a large share of children and adolescents do not reach these recommendations.

Activity is hard to judge by eye. A child may seem busy all day yet walk very little, or the reverse. A step counter turns movement into a number. A step count is easy to understand, easy to record, and easy to compare from day to day.

In pediatric care, pedometers are used in school activity programs, lifestyle and weight-management programs, recovery after injury or illness (when walking is allowed), and research studies. They also help families and teachers notice whether activity changes between school days, weekends, and holidays.

The safety profile is favorable. A pedometer is non-invasive. It does not use radiation, needles, electric current on the body, or medicines. The main safety points involve small parts, batteries, straps, and skin comfort. These are covered in the precautions section below.

History of the Pedometer: From Early Step Counters to Modern Trackers

The idea of counting steps is old. Sketches attributed to Leonardo da Vinci in the 15th century are often described as a mechanical device for measuring walking distance.

In the 18th century, European watchmakers built pocket pedometers in which a swinging weight and spring turned a small counting wheel. A Swiss watchmaker, Abraham-Louis Perrelet, is commonly credited with an early design.

A major milestone came in 1965 in Japan. A pedometer was marketed with a name that translates as "10,000-steps meter". The campaign helped spread the idea of walking 10,000 steps a day. That figure came from marketing and a round-number goal, not from a clinical trial in children or adults.

From the 1980s and 1990s, electronic pedometers with digital displays became small and cheap. Later, tiny motion sensors called accelerometers (sensors that detect changes in speed and direction of movement) replaced many mechanical parts. Wrist-worn trackers and smartphone step counting followed in the 2000s and 2010s.

Pedometers moved into pediatric use because they are light, inexpensive, and objective. Researchers in several countries collected step counts from large groups of children to see what daily values are typical for each age and sex.

Reviews of this evidence, including a widely cited 2011 review, then linked step counts to the physical activity guidelines used for children and adolescents.

Today, simple clip-on pedometers remain popular for school programs and research because they are low cost and easy to use. More advanced devices add activity minutes, sleep tracking, data storage, and app connections. The basic function is the same: counting steps.

Purpose of a Pedometer for Children and Where It Is Used

What a Pedometer Measures

A pedometer counts steps. Many models also estimate distance walked, time active, and calories used. Distance and calories are calculated from the step count using settings such as step length and body weight, so they are estimates and not direct measurements.

Common Uses and Clinical Settings

  • Tracking daily physical activity in healthy children and adolescents.
  • Supporting activity goals in programs for children with overweight or obesity.
  • Comparing school days with weekends, or term time with holidays.
  • Following gradual return to walking after an injury, surgery, or illness, when a healthcare professional has approved activity.
  • Measuring activity in school programs, sports clubs, and community health projects.
  • Collecting objective activity data in research and public health surveys.
  • Encouraging self-monitoring, since seeing a number can motivate some children. Studies of this effect show mixed and often modest results.

Where These Devices Are Found

Pedometers are found in homes, schools, community centers, sports clubs, pediatric clinics, hospital rehabilitation units, and research centers. They are sold as consumer products and supplied in bulk for group programs.

Key Point: A pedometer is a measurement and monitoring tool. It is not a diagnostic tool. It shows how many steps were taken, not how fit a child is, how hard the activity was, or whether a medical condition is present.

Different Types of Pedometers and Step Counters for Children

Mechanical Spring-Lever Pedometer

A small lever arm held by a spring moves up and down with each step. Each movement closes a tiny switch that advances a counter. It is usually clipped to the waistband and needs to stay upright. It is low in cost but sensitive to tilt and may miss slow or shuffling steps.

Electronic Piezoelectric Pedometer

A piezoelectric part produces a small electric signal when it is shaken or bent by walking. A circuit counts the signals. These models may be less affected by tilt than spring-lever types, but they can still be thrown off by poor positioning.

Accelerometer-Based Pedometer

A microscopic silicon sensor measures acceleration in one or three directions. A built-in program looks for the repeating pattern of steps. These models tend to count slow walking better, can store data by day or by minute, and are common in research.

Wrist-Worn Activity Tracker

This type looks like a watch or band and is worn all day. It is comfortable for many children and needs no clip. Because the wrist moves during play, arm movements may be counted as steps, and steps may be missed when the hands are still, for example while pushing a stroller.

Smartphone Step Counting

Many phones count steps with built-in sensors. Counting works only when the phone is carried. Young children often do not carry a phone, so this option suits older adolescents better than younger children.

Sealed or Research-Style Pedometer

Some pedometers hide or lock the display so the wearer cannot see or reset the count. This reduces the chance that a child changes behavior just to raise the number, and it prevents accidental resets. Staff read the data later.

TypeSensorUsual Wearing SiteTypical SettingMain Limitation
Mechanical spring-leverSpring-suspended lever armWaistbandBasic home and school useSensitive to tilt; may miss slow steps
Electronic piezoelectricPiezoelectric partWaistbandSchool programs, homePosition still affects accuracy
Accelerometer-basedMotion sensor (one or three directions)Waist, wrist, or ankleResearch, clinics, homeHigher cost; settings vary by model
Wrist-worn trackerMotion sensor in a bandWristHome, older children and adolescentsMay count arm movement as steps
Smartphone countingPhone motion sensorPocket or bagOlder adolescentsCounts only when the phone is carried
Sealed research-styleMotion sensor with hidden displayWaist or wristSurveys, studiesNo feedback for the wearer

Parts and Components of a Pedometer

Motion Sensor

The sensor detects the up-and-down and forward movement of walking. It is the most important part because every step count starts with its signal.

Processor and Counting Program

A small chip reads the sensor signal and decides which movements count as steps. The program ignores tiny vibrations and single bumps so that a shake does not become a step.

Display

The display shows the step count and, in some models, distance, time, or calories. A fading or blank display is often the first sign of a weak battery.

Power Source

Most simple pedometers use a small coin-shaped battery. Trackers use a rechargeable battery. Button and coin batteries are a serious hazard if swallowed, so a secure battery cover matters.

Casing

The casing protects the electronics from knocks, sweat, and dust. Some casings are water-resistant, but this differs between models and must be confirmed in the manual.

Clip, Strap, or Band

This part holds the device in the correct position. A loose clip can let the device tilt or fall off, and a tight band can irritate the skin.

Buttons, Memory, and Wireless Features

Buttons reset the count or change settings. Some models store daily counts in memory and send them to an app by Bluetooth or a cable.

ComponentRoleCheck or Replacement Interval
Motion sensorDetects movement of each stepNot replaceable; check accuracy every few weeks and after drops
Processor and programFilters signals and counts stepsNot replaceable; install software updates when available
DisplayShows the countCheck each use for fading or missing digits
BatteryPowers the deviceCoin cell: several months to a few years, by model. Rechargeable: capacity may fall after a few years
CasingProtects internal partsInspect for cracks before each use
Clip, strap, or bandHolds the device in positionReplace when loose, cracked, or worn; adjust as the child grows
Buttons, memory, wirelessReset, storage, data transferTest buttons and syncing regularly

How a Pedometer Works

Walking is a repeating pattern. With each step the body moves slightly up, down, and forward. A pedometer contains a sensor that feels this movement.

In a mechanical pedometer, a small weighted arm on a spring bounces with each step and closes a switch. In electronic models, tiny sensors measure how quickly the body speeds up and slows down. The sensor sends a signal to a small chip.

The chip compares the signal with a set pattern. A movement that is strong enough and repeats in a walking rhythm is counted as a step. Small bumps and random shakes are usually ignored, but some may still be counted.

Distance is worked out by multiplying the number of steps by the step length. If the step length is set incorrectly, the distance will also be wrong. Calorie values are rough estimates based on steps and body weight.

The count is stored until the device is reset. Many models reset automatically at midnight, while others need a button press.

Step-by-Step User Guide: How to Use a Pedometer for Children

  1. Read the manufacturer instructions. Each model has its own wearing position, settings, and limits. The manual also states whether the device is water-resistant.
  2. Check the battery and casing. The battery cover should be closed and secure. Cracked casings and loose parts should not be used with a child.
  3. Enter the settings. Some models ask for step length, age, or weight. A rough step length can be found by measuring the distance of 10 normal steps and dividing by 10.
  4. Choose the wearing position. Clip-on models are usually worn at the waistband in line with the knee, held upright and facing forward. Wrist models are worn snug on the wrist.
  5. Secure the device. The clip or band should hold firmly without pinching the skin. Long cords and neck straps are avoided for young children.
  6. Do a walking test. Reset the counter, walk 20 to 50 normal steps while counting by hand, and compare with the display. A large difference suggests the position or settings need adjusting.
  7. Reset and start. Set the counter to zero at the start of the monitoring day, usually in the morning.
  8. Wear it during waking hours. The device stays on through school, play, and travel. It is removed for bathing, swimming, contact sports, and sleep unless the manufacturer says otherwise.
  9. Record the count. Write the total in a log at the same time each day, before resetting the device.
  10. Repeat and average. Monitor for several days, including a weekend day, and calculate the average. One day alone can be misleading.

Note: Child cooperation matters. Young children may press buttons, remove the device, or shake it to raise the count. Sealed models or a short explanation can help. In clinics and research, staff usually receive training in setting up and testing the device. The manufacturer's instructions always take priority over general guidance.

Precautions and Possible Dangers of Using a Pedometer

  • Small parts: Clips, covers, buttons, and batteries can be swallowed or inhaled by young children. Devices with removable small parts are not suitable for unsupervised use by toddlers.
  • Cords and neck straps: A cord around the neck can cause strangulation. Waistband clips and wristbands are safer, and breakaway designs lower the risk when a cord is needed.
  • Skin reactions: Bands, adhesives, and some metals or rubber may cause redness or allergy in some children. Bands should be snug but not tight, and the skin should be checked regularly.
  • Rechargeable battery safety: Only the charger supplied by the manufacturer or an approved equivalent should be used. A device that becomes hot, swollen, or damaged should be taken out of use.
  • Pressure on the child: Step goals that are too high may push a child to keep moving when tired, unwell, or hurt. Pain, illness, and injury should always override a step target.
  • Medical conditions: Children with heart, lung, bone, joint, or muscle conditions should follow the activity advice of the treating healthcare professional, not a step target alone.
  • Emotional effects: Constant number tracking may cause anxiety, comparison with others, or an unhealthy focus on exercise in some children. Professional guidance is helpful if a child seems preoccupied with numbers or exercise.
  • Privacy: Devices linked to apps may store activity, location, and personal details. Privacy settings, strong passwords, and data deletion before passing on or discarding a device are important.
  • Contact sports: A hard casing can cause injury in contact sports, so the device is usually removed.
  • Accuracy limits: A step count alone should not be used to judge health, fitness, or growth.
  • Warning signs: Sudden loss of activity, unexplained tiredness, limping, breathlessness, or chest pain need medical review. Adjusting the pedometer goal is not a substitute.

Emergency Warning: A swallowed button or coin battery is a medical emergency. It can cause serious burns inside the throat or stomach within a couple of hours, even when the child looks well.

Emergency medical help or a local poison center should be contacted immediately. Vomiting should not be induced, and the child should not eat or drink until assessed. A missing battery cover or an unaccounted-for battery should be treated as urgent.

How to Keep the Pedometer Safe and Well Maintained

  • Cleaning: Wipe the casing with a soft, slightly damp cloth. Avoid harsh chemicals, and do not soak the device unless the manual confirms it is waterproof. Wash and dry bands after sweating.
  • Calibration: Repeat the walking test every few weeks and after a fall, drop, or battery change. Update the step length setting as the child grows.
  • Servicing: Inspect the casing, clip, strap, and battery cover regularly. Replace worn parts with those made for the same model.
  • Battery care: Replace coin batteries with the exact type listed in the manual. Keep spare and used batteries out of reach, and dispose of them through a battery recycling or collection point.
  • Storage: Keep the device in a cool, dry place. If it will not be used for a long time, remove the battery when the manual allows.
  • Data management: Save daily counts in a log or spreadsheet. For app-linked devices, review privacy settings and delete stored data before selling, gifting, or discarding the device.
  • Software updates: Install updates for the device and its app when released, since they may fix counting errors and security problems.
  • Backup plan: Keep a paper log and a spare device or fresh battery. A dead battery in the middle of a monitoring week can cause missing data.

Interactive Pedometer Readiness Checker

This simple checklist helps confirm that a pedometer is set up and used safely and consistently. Select each statement that applies, then press the Check button.

Select the statements that apply, then press Check.

Disclaimer: This checker gives general feedback only. It does not replace professional guidance or the manufacturer's instructions.

Interactive FAQ: Pedometers for Children

A pedometer is generally considered safe for school-age children when used as the manufacturer describes. It is non-invasive and does not use radiation. The main risks are small parts, batteries, cords, and skin irritation from bands. Babies and toddlers who are not yet walking steadily gain little from a step counter, and small parts pose a choking risk.

There is no fixed session. The device is worn through normal waking hours, and the daily total is read at the end of the day. A reliable picture of usual activity often needs several days, commonly three to seven, including at least one weekend day. Setting up and testing the device takes only a few minutes.

The main types are mechanical spring-lever pedometers, electronic piezoelectric pedometers, accelerometer-based pedometers, wrist-worn activity trackers, smartphone step-counting apps, and sealed research-style pedometers. They differ in the sensor used, wearing position, accuracy at slow speeds, data storage, and cost.

No. A pedometer is a non-invasive wearable device. It does not use ionizing radiation (the type of radiation used in X-rays), needles, or contact with the inside of the body. Models with Bluetooth or other wireless features send low-power radio signals, which are non-ionizing. Models without wireless features are also available.

No. A pedometer counts steps. It cannot diagnose diseases, measure fitness, or detect heart, lung, bone, or muscle problems. It can show a general pattern of walking-type activity, which a healthcare professional may use alongside a proper clinical assessment. A very low or suddenly changed step count has many possible causes and needs professional review.

Most children feel very little. A clip-on device may be felt as slight weight or pressure at the waistband, and a wrist-worn model feels like a watch. Some children notice the device at first or find a tight band uncomfortable. Redness under a band is a reason to remove it and let the skin rest.

Older methods include asking about activity, activity diaries, and direct observation. These depend on memory or on an observer's time and can be inaccurate, especially in young children. A pedometer gives an objective count taken automatically during the day. It does not describe the type of activity, and it is less detailed than a research-grade accelerometer.

The child wears the device, while an adult usually sets it up, checks the battery, and records the readings. In schools, teachers or program staff may collect the counts. In clinics and research settings, trained staff give instructions, test the device, and interpret the data. Older children and adolescents can often manage the device themselves.

For walking and running at usual speeds, many pedometers count steps with reasonable accuracy compared with hand counting. Accuracy tends to fall at very slow speeds, with shuffling steps, and in very young children. Research-grade accelerometers and direct observation give more detail. Distance and calorie values are estimates and are less reliable than the step count.

Special cases need extra care. A cast, brace, or walking aid can change the counts, and wheelchair users may not get meaningful step counts. Wristbands should not be worn over irritated or broken skin. Clasps and chargers may contain small magnets, so manufacturer and clinician guidance is worth checking when an implanted medical device is present.

Use depends on the purpose. Many programs use it daily for several days, or for a few weeks at a time. A battery may need replacing after several months to a few years, and straps or clips may wear out sooner. A quick walking test every few weeks, and after any drop or battery change, confirms that counts stay reliable.

Letting the child handle the device first, explaining what it does in simple words, and starting with short wearing periods often helps. A different wearing position or a softer band may be more comfortable. Step targets should never be used as pressure or punishment. If distress continues, it is reasonable to stop and use another method.

No single number is accepted worldwide. Official guidelines are written in minutes, not steps. WHO advises an average of at least 60 minutes per day of moderate to vigorous activity for ages 5 to 17 years. Research reviews suggest school-age children often average roughly 10,000 to 16,000 steps per day, with wide differences by age and sex.

Not always. A step count shows how much walking-type movement occurred, but not how hard the activity was. Slow walking and brisk walking can produce the same number of steps. Activities such as cycling and swimming add few or no steps. Step counts are most useful alongside other information about activity type and intensity.

Other Methods and Alternatives for Measuring Children's Activity

A pedometer is one of several ways to describe physical activity. Each method has a different balance of cost, detail, and effort.

MethodBasic PrincipleCommon Use
Pedometer (step counter)Counts steps from body movementDaily activity tracking, school programs, basic research
Research-grade accelerometerRecords movement strength and timing, often minute by minuteResearch on activity level and intensity
Wrist-worn consumer trackerMotion sensor with app, sometimes with a heart rate sensorPersonal activity tracking at home
Smartphone step appUses the phone's motion sensorCasual tracking in older adolescents
Activity diary or questionnairePerson or adult reports what activity was doneLarge surveys, low-cost screening of habits
Direct observationTrained observer watches and records activityPlayground, classroom, and research studies
Heart rate monitoringUses heart rate as a sign of effortExercise intensity in sports and research
Doubly labeled waterMeasures total energy use over one to two weeks with harmless isotopesReference method in research settings

Frequently Overlooked Points Worth Knowing

  • One day is not enough. Activity varies a lot from day to day. Several days, including a weekend day, give a more reliable picture.
  • The first days may not be typical. Wearing a new device can change behavior for a short time. Sealed models reduce this effect.
  • Steps do not show intensity. Slow walking and brisk walking can give the same count. In controlled studies of children aged 10 to 15 years, continuous brisk walking produced roughly 3,300 to 3,500 steps in 30 minutes.
  • Some activities are poorly counted. Cycling, swimming, skating, climbing, and scooter riding add few steps or none. Car rides and bumpy trips may add false steps.
  • The 10,000 steps figure is not a child target. It came from adult-focused marketing. Studies in school-age children report higher averages, and the values differ by age and sex.
  • Growth changes step length. Distance estimates become less accurate unless the step length setting is updated.
  • Use one device and one position for comparisons. Switching devices or wearing positions can change the counts.
  • A weak battery may cause undercounting before the display fades.
  • Waistband fit matters. A loose waistband or a tilted device may miss steps, especially at slow speeds.
  • Gradual change is easier to sustain. Small increases over several weeks are generally easier to keep up than sudden large jumps.
  • Weather, school timetable, and season affect steps. Low counts in winter or exam periods do not always signal a problem.

How to Read and Understand the Results

Result ParameterWhat It Means
Daily step countTotal steps in one day. Shows the amount of walking-type movement. A single day can vary widely.
Average daily stepsThe mean over several days. More reliable than any one day.
Weekday versus weekend stepsShows how school days and free days differ in activity.
Estimated distanceSteps multiplied by step length. Approximate, and depends on the setting.
Active minutes (some models)Time spent stepping at a pace above a set rate. Rules differ between devices.
Cadence (some models)Steps per minute. A higher rate suggests a faster walking pace.
Estimated caloriesA rough estimate from steps and weight. The least reliable value on most devices.

Note: Reference values vary by age, sex, and population. They also depend on the type of pedometer, where it is worn, and how many days were monitored. A step count should be read as a general guide and discussed with a healthcare professional when there is a concern.

Approximate Reference Values from Research

The figures below come from research reviews of step counts in children. They describe averages seen in studies and are not clinical cutoffs. Guidelines from WHO are written in minutes of activity, not in steps.

Age GroupApproximate Steps per Day in StudiesComment
Preschool (about 4 to 6 years)About 10,000 to 14,000 steps were linked with 60 to 100 minutes of moderate to vigorous activityLimited evidence; wide variation
School-age children (about 6 to 11 years)Boys often average about 12,000 to 16,000; girls about 10,000 to 13,000Averages differ by country and method
Adolescents (about 12 to 18 years)Averages tend to fall with age, to about 8,000 to 9,000 by age 18About 10,000 to 11,700 steps were linked with 60 minutes of moderate to vigorous activity in limited evidence

For reference, WHO advises an average of at least 60 minutes per day of moderate to vigorous physical activity for children and adolescents aged 5 to 17 years. For children under 5 years, WHO guidance focuses on time spent active, sleep, and limiting screen time and sitting, rather than steps.

Advantages and Limitations of a Pedometer

Advantages

  • Non-invasive, with no radiation, needles, or medicines.
  • Low cost compared with research-grade equipment.
  • Simple to use, with a number that is easy to understand.
  • Gives an objective measure that does not depend on memory.
  • Lightweight and suitable for long wear during normal activities.
  • Can be used in schools, homes, clinics, and community programs.
  • Allows day-to-day and week-to-week comparison.

Limitations

  • Shows steps only, not intensity, type of activity, or fitness level.
  • May undercount slow, shuffling, or irregular steps, which are common in toddlers.
  • Poorly captures cycling, swimming, skating, and other non-stepping activity.
  • Distance and calorie values are estimates and can be quite inaccurate.
  • Accuracy differs between models and wearing positions.
  • Cannot diagnose or rule out a medical condition.
  • May cause pressure, comparison, or unhealthy focus on numbers in some children.
  • Small parts and batteries create safety risks for young children.
  • Step targets in research are averages and may not suit every child.

Troubleshooting Common Problems

ProblemPossible CauseSuggested Solution
Count stays at zeroWeak or empty battery; device tilted; device switched offReplace or charge the battery, wear the device upright as described in the manual, and check the on/off setting
Count is too lowLoose clip; slow or short steps; weak battery; wrong positionReposition the device, tighten the clip, repeat the walking test, and replace the battery
Count is too highShaking, bumpy travel, vigorous arm movement, or play with the deviceWear the device securely, remove it during vehicle trips if possible, and consider a sealed model
Display is blank or dimLow battery or damageReplace or charge the battery; contact the manufacturer if the problem continues
Count resets unexpectedlyAccidental button press; automatic midnight reset; weak batteryCheck the reset settings, keep a written log during the day, and replace the battery
Device falls off or twistsLoose clip; loose waistband; unsuitable clothingUse a secure clip or a wristband model, and wear it on a firmer part of the waistband
Skin redness under the bandTight band, sweat, or material allergyRemove the device, let the skin rest, loosen or change the band, and seek advice if redness persists
Data does not sync to the appBluetooth off, app out of date, or low batteryTurn on Bluetooth, update the app, charge the device, and try pairing again
Distance looks wrongIncorrect step length settingMeasure step length again and update the setting

When to Contact the Manufacturer or Service Provider

  • The battery compartment is damaged, will not close securely, or the cover is missing.
  • The casing is cracked and internal parts or the battery are exposed.
  • A rechargeable device becomes very hot, swollen, or leaks during charging or use.
  • Counts remain clearly wrong after repositioning, a battery change, and a repeat walking test.
  • The display fails, buttons stop working, or the device will not turn on.
  • A device claimed to be water-resistant stops working after contact with water.
  • Syncing problems continue after app and device updates.
  • Replacement clips, straps, or bands are needed.
  • A safety notice or product recall applies to the model.

Tip: Keep the model name, serial number, purchase date, warranty details, and the original manual in one place. Photos of any fault and notes on what happened before it appeared can speed up support and warranty claims.

Checked and reviewed by a pediatrician

Suggested Reading and Official Resources

The following official and scientific sources give further detail on children's physical activity and step counting. They are listed by name and description only.

  • WHO Guidelines on Physical Activity and Sedentary Behaviour (2020), covering recommendations for children and adolescents aged 5 to 17 years.
  • WHO Guidelines on Physical Activity, Sedentary Behaviour and Sleep for Children Under 5 Years of Age (2019).
  • "How many steps/day are enough? For children and adolescents," International Journal of Behavioral Nutrition and Physical Activity (2011), a review of step-based activity values.
  • "Using Pedometers for Measuring and Increasing Physical Activity in Children and Adolescents," American Journal of Lifestyle Medicine (2015).
  • "A systematic review of studies using pedometers to promote physical activity among youth," Preventive Medicine (2009).
  • Pediatric textbook chapters on physical activity, obesity prevention, and growth and development.
  • Physical activity guidance from national pediatric societies and public health agencies.
  • Consumer product safety authority guidance on button and coin battery safety.
  • The manufacturer's user manual and safety leaflet for the specific device.

Medical Disclaimer: This page is for educational purposes only. It does not replace professional medical advice, diagnosis, or treatment.

Step counts and activity information here are general and may not apply to every child. Always consult a qualified healthcare professional with questions about a child's health, activity level, or a medical condition, and follow the manufacturer's instructions for the device.

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