I've owned 2 Giant Schnauzers and I have to say they are VERY active. My first was active up till her HD got the better of her. My current is off the wall active. I have to make sure she gets a good run everyday otherwise the house would be destroyed. Some times I'm the one that gets worn out first. I get her involved in a variety of different activities. Giants are definitly a breed that will keep you on your toes. They will try to out think you at every turn. Oh yeah and they can be big babies. I love this breed!