I got my first dog at age four and have since had three more. My first dog was a Siberian husky and my subsequent dogs have been much smaller. I am quite used to exercising with dogs. If your dog has a lot of energy that you may not have the time or desire to attend to, don't worry. I love running and playing with the dogs I look after. I work out enough to be comfortable running with big dogs and have never had an issue keeping their leash firm in my grasp. Spring is finally here again and doggy or no I'm going to be spending a lot of time outside. So why not bring a canine companion along for the ride too?