I'd say the opposite,whenever i need to get a dog fit i build everything around long on lead walks.
running off lead and biking are just extras.
I,v never walked a dog fit Neems, i dont think you can, and i,v had some good Hare dogs in the past, not Saluki blood either, i,v just increased their work load as and when. I know alot of Greyhound men walk their dog's to their standard of fitness but thats not fit enough for a good working dog, not imo anyway.
PS, Listen at me with my Beddy X Whippet LOL.
thats fair enough mate,i used to try everything other than walking because