For many of us, one of the most enjoyable aspects of fitness is seeing the results. It's not the only reason we workout, of course--fresh air and the endorphin rush make it pretty worth it, too--but who doesn't enjoy the thrill of running a faster mile, climbing a bigger hill, or lifting increasingly more weight?
Just as we do with our computers, we love analyzing the data from our workouts. Be it the speed at which we run, the power we output when we cycle, or simply the number of calories we burn, these sites will help you record it all, complete with graphs and charts to track your progress in the various activities you do to stay fit. Whatever your sports are, there's sure to be one or more that will help you take your fitness to the next level. Pair them with your smartphone to get the most out of your workouts.
Nike+ has always been a great way to keep track of your runs, but until recently, was iPhone only. Nike+ now works with Android phones and iDevices. For runners, the Nike+ system is a well designed way to track your speed, heart rate, and location data. If you aren't a runner, use Nike's fuelband to track all your other activities. Nike+ measures workouts in "fuel," which you can stack up against other Nike+ members.