Originally Posted by
ninja9578
It doesn't expose anything, if you're exposing your body to throw a rear-leg kick then your form is incorrect. Also, a read leg roundhouse from an experienced martial artists shouldn't take more than 100ms. A black belt can deflect it, but someone who doesn't know how to fight won't be able to. Even if they see it coming and somehow get their arm there, doing a correct block takes skill. If the block is wrong the arm will absorb the kick and break instead of harmlessly deflecting it. I agree you should never open with it, though, but a rear-leg sweep would work nicely.