I recently saw on one of those training-type TV shows (don't remember if it was "Good Dog" or "Pet Guys") that said when a big dog is jumping up, one way to curb it is to lift your knee just as the dog is jumping up so that you catch her in the chest, and say "No!" at the same time. You're not kicking her - she's actually running into your knee, so the force is all hers. A big dog like yours won't be hurt by this, but she'll get the idea that it's not ok for her to jump.
Good luck!
