I'm guessing MUTs are what are called "bike and pedestrian paths" in Norway, which means cyclists are expected to use them instead of the road, and are also expected to share them with Grandma in a wheelchair, your neighbour walking 5 dogs, and gaggles of oblivious teenage girls... *sigh*

Now kids, dogs and elderly people - I give them lots of slack. They either don't know any better, or grew up in a time when things just went slower.
And no, I don't use these trails for any serious training. (Well, I don't actually DO any serious training )

But I really really wish sometimes that we could have a set of "smart pedestrian"-rules, to go with the "friendly cyclist rules", like: Remember there are people out here trying to get from A to B. Try to stay somewhat to one side. Glance behind you before you cross the path. And please don't walk your dog on one side of the path, if you're going to be on the other side... It seems some people feel that paths like these are like strolling around inside a mall and seem shocked at somebody passing them at anything over stroll speed. Since I started biking regularly I'm never startled by other cyclists when I'm on foot. It just depends on what you expect.

But of course what we REALLY want are dedicated bike paths, right?