Every once in a while I post links that I think authors who write about fighting should know of. I do not know how many unrealistic fight scenes I have read and how much idiotic protection people wear, but there have been a lot of them. Medieval fight scenes are a particular pet peeve of mine.
Writing solely for entertainment is OK. I can read stories with idiotic fight scenes and still be entertained. But I probably won’t review that story unless the author has asked me to. Although I try to phrase things as nicely as possibly, I have tell readers that the fighting in the story is unrealistic.
Snapjelly has one of the greater sites on medieval sword fighting I have found. He’ll try to answer any question. If you scroll down this link to his videos on Youtube, you will probably find answers to most questions about that kind of fighting. This video should illustrate that the dude knows what he is talking about.