Walking on a chilly May 18 was the tonic for my lazy body..it takes a little extra motivation ..but Savannah my wired up Border collie x helps in that department. Professional food stealer extraordinaire and hyperactive girl that she is ..I haven't put her to the test..but I am convinced she could walk until collapse. She senses when I put the running shoes on and correct sweater made for the walk and is ready to go at the door..