Get your hands on the Summer 2016 Issue of The Bark magazine and you will find a nice little plug for the Iron Doggy™ Runner's Choice hands-free dog leash. Smack dab between the recommendation for vintage ceramic dog bowls and the one for instant bone broth is a blurb about "hands-free fun."
According to The Bark, the Runner's Choice lets you have a little more control over your dog when you run. That's for certain, and a little more control is the thing that makes all the difference.