If you love hitting the trails or jogging through your neighborhood, having the right running buddy makes all the difference—and for many dog owners, that buddy has four legs and boundless energy. But ...

My new workout partner isn’t providing that extra boost I had imagined. I am out of shape. A 3-mile run used to be my warm-up. Now I’m huffing and puffing to complete 1 mile. My legs are burning and ...