Runners and cyclists will appreciate the lighter, thinner version of the iPhone when using Strava Cycling and Strava Run. Strava's apps track distance, speed, elevation, heart rate, power, and calories burned during workouts and automatically record the information on

Accumulating these statistics enables users to self-challenge by setting personal goals, compare and compete with other athletes, or strive for the "King and Queen of the Mountain" honors awarded by the app.

Athletes can also discover new rides and runs by viewing their friends' records. The social feature, which allows athletes to comment on one another's activities, certainly has the potential to liven-up a solo workout.

Users can subscribe to the premium service on the Web site or through the iPhone for $5.99 per month or $59.99 per year. The Strava premium package offers Filtered Leaderboards to benchmark against those of a like age and weight class; Power Zone Analysis to monitor power output and watts (for cyclists) and speed and focus (for runners); Heart Rate Analysis; and Suffer Score to quantify the degree of suffering.

The app is compatible with iPhone, iPod touch, and iPad, but requires iOS 4.3 or later.

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-- Written by Nathalie Pierrepont in New York

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