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The best dog breeds to run with.
From "bonking" to bee stings, be prepared for anything.
Scientists say you may be able to get it without exercise—one day.
Just make sure you try these on a stationary bike.
8 awesome fitness benefits of trail running.
We sat down with Dean Karnazes to talk training, food, and more.
The precise mathematical formula you need to train for a marathon.
Go off road with these seven tips from pro endurance athletes.