Definitely not loose. I wrap a leash around my waist like a belt, then clip his leash to that. He's trained to run next to the bike, unless I tell him to go...then he'll go ahead an go in front and pull/run.
I actually don't have the full size pic of it on this computer, sorry.:(
I built a new computer recently and didn't transfer all my pictures from the hard drive on my old computer.