The Nike + iPod Sport Kit is quite accurate for most users. You can improve the accuracy by calibrating the Nike + iPod Sport Kit to your natural running and walking styles.
To calibrate Nike+iPod for running and walking:
1. Choose Nike+iPod > Settings > Sensor > Calibrate and press the Center button.
2. Choose Run and choose a distance.
3. Press the Center button and run the set distance at a steady, natural pace.
4. Press the Menu button and choose Done Calibrating. A message tells you if the calibration was successful.
5. Repeat steps 1–4, choosing Walk in step 2 and walking at a steady, natural pace in step 3.
Note: Even after calibrating, the accuracy of the distance measurements may vary depending on gait, running surface, incline, or temperature.
For more information on the Nike + iPod Sport Kit, see the Nike + iPod Sport Kit User’s Guide.