Yes, I use a leash/harness. Silka has been trained since she was a baby 3 1/2 years ago to use it and knows its limitations, even when running. The spot where it appears she pulls too hard is me adjusting the camera as I get up from a crouch.She stops to give me the "Keep up look". She's not harmed in this video.
This isn't violent rabbit behavior, she's having fun playing with a smaller critter than her.
Silka has experience with playing with black labs and other dogs, which she can keep up with.
She's wonderful with other animals and small children (She will let them chase her around, and vice versa)
****Remember, not all rabbits behave this way, so please don't try this at home unless you're comfortable with doing so.