Yes, it's my belief that they're actually being whipped and that that is the major difference. Do you believe otherwise? Pro wrestlers generally go to great lengths not to injure each other. In pornography the audience will copmlain that the violence is fake if the whips aren't real.
> But they don't actually murder people to make movies. When you watch Rambo are people actually being shot?
No, I don't, that's why I'm not coming here to share research about the abuse being routinely inflicted on actors during the filming of Hollywood films.
> they are probably using a very narrow definition to produce this extreme result
The study is linked in the article and I've told you the definition they're using. I'm not sure why you have to continue with conjecture as to what they're "probably" saying.