multiple response, which is typically the way I do single leg hurdle stuff... is more effect on the muscle tendon complex as a whole. insane exercise for ankle stiffness... which is a good thing bc holm has 4x as stiff achilles as the average human. The single response will be more all out CNS drive than doing multiples over low hurdles, but they are both good exercises. I would actually recommend doing multiples over several hurdles, but you can certainly do both in training. I think multiples are good also because you will always have a good forward momentum and hit the ground at a constant angle. jamillian kind of shuffles down into his plant to get a better liftoff instead of really dropping and you can't cheat with multiple hurdles