Well, it is always good to keep your feet moving. You can easily be overbalanced and knocked down if you try to stand firm, but your opponent is stronger. Practice as often as you can, so your wrist can easily support the weight of your blade, and you can make your movements faster, and more fluid. Ehm, I have a short sword, which is better for stabbing than slicing, so that is my preferred attack and may not suit you if you carry a sword of the Big Folk.