Walking a dog can be fun but you will need a reliable leash for it. The Ergo Leash can help. It is a 2-handed leash that lets you leverage your entire body to walk your dog and give her a good workout. It improves posture and increases your control. The Ergo Leash comes with textured-grip handles and a loop for your keys or poop bag.
The Ergo Leash can handle large dogs quite well. It has a cushioned loop for loose leash walking. You can find it on Kickstarter at this time.