Pedometer

number of steps takennumber of steps walkedstep counterstep countersstep countingstepssteps taken
A pedometer is a device, usually portable and electronic or electromechanical, that counts each step a person takes by detecting the motion of the person's hands or hips.wikipedia
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Activity tracker

Smart bandfitness trackeractivity trackers
Step counters are being integrated into an increasing number of portable consumer electronic devices such as music players, smartphones, mobile phones and watches (called activity trackers)
Electronic activity trackers are fundamentally upgraded versions of pedometers; in addition to counting steps, they use accelerometers and altimeters to calculate mileage, graph overall physical activity, calculate calorie expenditure, and in some cases also monitor and graph heart rate and quality of sleep.

Walking

walkambulantwalkers
Often worn on the belt and kept on all day, it can record how many steps the wearer has walked that day, and thus the kilometers or miles (distance = number of steps × step length).
Some people prefer to walk indoors on a treadmill, or in a gym, and fitness walkers and others may use a pedometer to count their steps.

Nike+

Nike+iPodNike+ for iPodNike+ GPS
Apple and Nike, Inc. offer the Nike+iPod Sports Kit, which uses a motion sensor that fits into a Nike shoe or in a pocket worn on the laces of other brands of shoes.
On September 7, 2010, Nike released the Nike+ Running App (originally called Nike+ GPS) on the App Store, which used a tracking engine powered by MotionX that does not require the separate shoe sensor or pedometer.

IPhone

iPhonesApple iPhoneiPhone app
The sensor communicates with an iPhone (3GS or higher), iPod touch (2nd generation or higher), iPod nano (4th generation or higher), or dedicated adapter to transmit workout information such as elapsed time, distance traveled, and calories burned.
It is also used for fitness tracking purposes, primarily as a pedometer.

Accelerometer

accelerometersG-sensoracceleration sensor
The 5th and 6th generation iPod Nano by Apple features an integrated accelerometer.
Along with orientation view adjustment, accelerometers in mobile devices can also be used as pedometers, in conjunction with specialized applications.

Fitbit

The Fitbit is an always-on electronic pedometer, that in addition to counting steps also displays distance traveled, altitude climbed (via a number of flights of steps count), calories burned, current intensity, and time of day.
Its products are activity trackers, wireless-enabled wearable technology devices that measure data such as the number of steps walked, heart rate, quality of sleep, steps climbed, and other personal metrics involved in fitness.

Thomas Jefferson

JeffersonPresident JeffersonJeffersonian
A mechanical pedometer obtained from France was introduced in the US by Thomas Jefferson.
He improved the pedometer, the polygraph (a device for duplicating writing), and the moldboard plow, an idea he never patented and gave to posterity.

List of Nintendo DS accessories

PokéwalkerGBA Movie PlayerNintendo DS Digital TV Tuner
Each game comes bundled with a device called a Pokéwalker, which functions as a pedometer and allows players to transfer one Pokémon from their game to the Pokéwalker via infrared signals.
The Pokéwalker is a Poké Ball-shaped pedometer which can connect to Pokémon HeartGold and SoulSilver game cards via infrared signals.

Wii Fit U

Fit Meter
On October 31st, 2013, Nintendo released Wii Fit U, which was able to interface with the Fit Meter, which was a pedometer with similar hardware to the Pokéwalker, but instead themed around Wii Fit U and with the ability to store and display the user's Mii.
All retail copies of Wii Fit U are bundled with a foldable Wii U GamePad Stand and an activity meter (pedometer) called the Fit Meter, also available separately, which is carried while jogging or otherwise moving.

Electronics

electronicelectronic equipmentelectronic device
A pedometer is a device, usually portable and electronic or electromechanical, that counts each step a person takes by detecting the motion of the person's hands or hips.

Mechatronics

Mechatronics EngineeringmechatronicMechatronic Engineering
A pedometer is a device, usually portable and electronic or electromechanical, that counts each step a person takes by detecting the motion of the person's hands or hips.

Motion

movementMotion (physics)locomotion
A pedometer is a device, usually portable and electronic or electromechanical, that counts each step a person takes by detecting the motion of the person's hands or hips.

Hip

hip jointhipship-joint
A pedometer is a device, usually portable and electronic or electromechanical, that counts each step a person takes by detecting the motion of the person's hands or hips.

Calibration

calibratedcalibratecalibrating
Because the distance of each person's step varies, an informal calibration, performed by the user, is required if presentation of the distance covered in a unit of length (such as in kilometers or miles) is desired, though there are now pedometers that use electronics and software to automatically determine how a person's step varies.

Unit of length

lengthunits of lengthDistance
Because the distance of each person's step varies, an informal calibration, performed by the user, is required if presentation of the distance covered in a unit of length (such as in kilometers or miles) is desired, though there are now pedometers that use electronics and software to automatically determine how a person's step varies.

GPS navigation device

GPS receiverGPSGPS navigation
Distance traveled (by walking or any other means) can be measured directly by a GPS receiver.

Sport

sportsathleticathletics
Used originally by sports and physical fitness enthusiasts, pedometers are now becoming popular as an everyday exercise counter and motivator.

Physical fitness

fitnessphysical trainingphysical
Used originally by sports and physical fitness enthusiasts, pedometers are now becoming popular as an everyday exercise counter and motivator.

Exercise

physical exerciseexercisingphysical activity
Used originally by sports and physical fitness enthusiasts, pedometers are now becoming popular as an everyday exercise counter and motivator.

Belt (clothing)

beltbeltsleather belt
Often worn on the belt and kept on all day, it can record how many steps the wearer has walked that day, and thus the kilometers or miles (distance = number of steps × step length).

Benchmarking

benchmarkbenchmarksbenchmarked
A total of 10,000 steps per day, equivalent to 8 km, is recommended by some to be the benchmark for an active lifestyle, although this point is debated among experts.

Motivation

intrinsic motivationmotivationalmotives
Pedometers can be a motivation tool for people wanting to increase their physical activity.

Blood pressure

systolic blood pressurediastolic blood pressurearterial blood pressure
Pedometers have been shown in clinical studies to increase physical activity, and reduce blood pressure levels and Body Mass Index.

Body mass index

BMIbody mass index (BMI)body-mass index
Pedometers have been shown in clinical studies to increase physical activity, and reduce blood pressure levels and Body Mass Index.

Surgeon General of the United States

Surgeon GeneralU.S. Surgeon GeneralOffice of the Surgeon General
The target has been recommended by the US Surgeon General and by the UK Department of Health.