[jimmygrapes]

You ever go running with an energetic medium-large dog? Sometimes they are just so excited they want to sprint away, much faster than you can possibly bring yourself to go. It's not that you wouldn't love to go that fast, you just can't, and you have to pull the younger, more dependent dog back to a tolerable pace for you. You're still running, just at a pace that doesn't cause injury. You're also making sure that the dog doesn't get off the leash and cause any harm or get unintentionally harmed.