car,nt anwser as i,ve only used them at shows but i would say if you doing 2 keep your dog fit ,you would have 2 it alot ,personally i,d prefer 2 get out and do it ,lots road bikeing ,i lamp them 3/4 nights aweek and mooching,that should do it ,i thought the lure was for learning young dogs or just a bit fun at shows or for raceing whippets