Most of the wrestlers were very good. All the slams appeared real. It is important to note that the ring mat is padded and the wrestlers know how to land so they suffer minimal pain or chance of significant injury.

Most of the hits did not appear to connect hard. You can see from the GIF that CM Punk's knee did not actually connect with Gunther's head. The slaps to the chest were real. I could hear the impact of Gunther slapping CM Punk. From where I was sitting, I could also see red marks and scratches on the wrestlers bodies.

You need to consider that many of these wrestlers wrestle several times a week. They don't have long rest periods like boxers or MMA fighters. This takes quite a toll on their bodies.