Tae Kwon Do Practice

Jayden and Conner practicing their blocks with their Tae Kwon Do instructor.  Take note of this photo, I accidentally left the ISO at a whopping 2500.  It was unnecessary in my mind, since there was great light coming into the dojo.  Can you notice the noise effect it created with the objects that are up close?  I post processed a little to remove the noise, but I think it's still noticeable.