Exercise and volunteering can seem like extras in our lives that we just don't have time for, so why not combine the two? There are organizations such as Get Fit With Fido in Seattle where you can volunteer to exercise shelter dogs. Walking or running with a dog is a great skill you can offer, and not only will the pooch love the attention and fresh air, but you'll also benefit from the furry companionship. Not to mention, both of you can stay fit together. Another plus is that when you take the dogs out, you can help them find a home faster since more people will get to meet them. Obese dogs that trim down will also find homes quicker since pudgier pooches tend to get overlooked by people wanting to adopt. Exercised dogs are also calmer and train more easily, so their good manners and friendly demeanor are also a bonus for prospective pet owners.
So if you don't have your own dog to run with, borrow one that is in need of your love and attention. Call up your local shelter to see if they offer programs where a group of volunteers take dogs out together. If they don't, I'm sure they'll be excited to have you exercise dogs on your own. Go on your lunch break once a week, a few times a week, or for longer workouts, go on your days off.