Bryan Chaffin, The Mac Observer:
Apple Watch spokesperson Christy Turlington-Burns posted her Week Three blog entry in a series about training for the upcoming London Marathon. Mrs. Turlington-Burns said in her Apple-sponsored blog that after a few uses, her Apple Watch learned enough about her stride that she didn't need her iPhone with her to accurately track her results.
"After you run with Apple Watch and your iPhone a few times, the Workout app knows more about your stride," she wrote. "So you can run on a treadmill or outside without your phone and still get a really accurate workout summary."
Here's Christy's post.