How to Track Your Workout with Your iPhone
You can use your iPhone to give yourself workout goals and track your progress. The Nike+ app for the iPhone can help you meet your fitness goals. Apple has teamed with the folks at Nike on a wireless sports kit that lets runners place a sensor inside a Nike sneaker that can wirelessly communicate with an iPhone 3GS or 4 (but not earlier iPhone models).
As runners dash off, they can track time, distance, and calories burned, receive vocal feedback, and upload results to a Nike Web site. Runners can even play a select power song for that last push when they’re feeling exhausted.
By using Nike+ on your iPhone, you can select one of these workout routines:
Basic: This option basically just lets you choose a playlist to listen to while you run.
Time: Lets you choose the length of your workout.
Distance: If you're running or jogging, Nike+ lets you know when you've reached your distance goal.
Calorie: Counting calories? This option lets you know when you've burned off an approximate number of calories.