Nike+iPod
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The Nike+iPod Sports Kit is a device which measures and records the distance and pace of a walk or run. The Nike+iPod consists of a small accelerometer[1] attached to or embedded in a shoe, which communicates with a receiver plugged into an iPod nano. iTunes software can be used to view the walk or run history. The kit was revealed on May 23, 2006 but for a short time was unavailable for purchase. The kit is able to store information such as the elapsed time of the workout, the distance traveled, pace, or calories burned by the individual wearing the shoes, and display it on the screen or broadcast it through the headphones of an iPod.
Sports Kit Equipment
The kit consists of two pieces: a piezoelectric accelerometer with a transmitter that is mounted under the inner sole of the shoe and a receiver that connects to the iPod. Nike recommends that the shoe be a Nike+ model with a special pocket in which to place the device. Nike has released the accelerometer for individual sale meaning that consumers no longer have to purchase the whole set.[2]
After-market solutions are available to users who do not want to use shoes with built-in or hand-made pockets for the accelerometer, such as shoe pouches and containment devices designed to affix the accelerometer against the shoe laces. No matter how the accelerometer is integrated with the user's shoes, care must be taken that it is firmly fixed in place and will not jerk around while in use, which would degrade the accuracy of the accelerometer.
Sports Kit Usage
The Sports Kit can be used to track running, which it refers to as "workouts". New workouts are started by plugging the receiving unit into the iPod, then navigating through the iPod menu system. The user chooses a goal for the workout, which might be to cover a specific distance, or burn a number of calories, or workout for a specified time. A workout can also be started without a goal, which is called a "Basic Workout". When the workout goal has been set, the receiver seeks the accelerometer, possibly asking the user to "walk around to activate [the] sensor". The user then must press the center button on the iPod to begin the workout.
Audio feedback is provided in a the user's choice of generic male or female voice by the iPod over the course of the workout, depending on the type of workout chosen. For goal-oriented workouts, the feedback will correspond to significant milestones toward the goal. In a distance workout, for example, the audio feedback will inform the user as each mile or kilometer has been completed, as well as the half-way point of the workout, and a countdown of four 100-meter increments at the end of the workout.
The iPod's control wheel functions change slightly during a workout. The Pause button now not only pauses the music but also the workout. Similarly, the Menu button is used to access the controls to end the workout. The Forward and Back buttons are unchanged, performing audio track skip and reverse functions. The Center button has two functions: audio feedback about the current distance, time, and pace are provided when the button is tapped once, while if the button is held down the iPod skips to the "Power Song" - an audio track chosen by the user, generally intended for motivation.
In addition to the in-workout audio feedback, there are pre-recorded congratulations provided by Lance Armstrong, Tiger Woods, Joan Benoit Samuelson, and Paula Radcliffe whenever a user achieves a personal best (such as fastest mile, fastest 5K, fastest 10K, longest run yet) or reaches certain long-term milestones (such as 250 miles, 500 kilometers). This "celebrity feedback" is heard after the usual end-of-run statistics.
While the Sports Kit can be used immediately after purchase, it will report more accurate results if it is calibrated before the first usage and then regularly afterwards. For calibration, the user finds a fixed known distance of at least 0.25 mile or 400 meters and then sets the Nike+ to calibration mode for the walk or run over that distance. When the walk or run is complete, the device calibrates itself and future workout reporting will reflect statistics closer to that individual user's workout style. Consumer Reports magazine tested the device and found it accurate as long as you keep an even pace. In workouts with varied pace, accuracy was sometimes less that 90%. As walking and running strides can vary significantly, the device should be calibrated for each.
Online Integration
In addition to tracking personal workout statistics, the Nike+ integrates directly with the Nike website. Workout data can be automatically uploaded to the website during an iPod sync with iTunes or through another program via the website's public API. The uploaded information is mostly not personally-identifying, but does also contain some personal statistics such as weight (if configured). Workout data is stored in XML files on the iPod, which has led some web and applications programmers to offer alternatives to the official Nike reports.
On October 19, 2006, new features were added to the Nike+ website, including the ability to name runs. Forums were also added, allowing users to meet and challenge other runners, ask questions, and give feedback. Recently, there have been several more additions to the Nike+ website including but not limited to: a challenge gallery where all user created challenges are viewable, the ability to name the route taken when running or walking, compatibility with the new iPod nano (third generation), a distance club to view everyone's total distance traveled, fastest 5K et cetera.
Privacy concerns
Privacy concerns were raised when graduate students T. Scott Saponas, Jonathan Lester, and Carl Hartung at the University of Washington discovered security flaws in the device that can be exploited to track the user.[3][4] According to their research, the students discovered that the Nike+iPod transmitter gives off radio frequencies that can be read up to 60 feet away using RFID. During the test, students built a US$250 surveillance device and integrated it with Google Maps, easily tracking the movement of the person wearing the Nike+iPod transmitter. Although no personal data is stored in the transmitter's chip, a privacy concern was raised regarding RFIDs after the students were easily able to track the movement of the person, claiming that its tracking ability could be used for surveillance by scanning the data and linking it to a user's identity.[5]
References
External links
- Nike+iPod raises RFID privacy concerns - CNET News
- Nike+iPod - official site at Apple's website
- Nike+ - official site at Nike's website
- Nike+ Wordpress Plugin
- Running Tracker - a free software that permits to analyze and compare Nike+ workouts
- Neki++ - an open source workout management and visualization tool
- Video Review of the Nike+ Sport Kit by The Digital Lifestyle (thedigitallifestyle.tv)