Great idea! -distracting yourself (with a walk, in your case) is a great way to prevent that "eating" thing from getting out of hand.
But I think it's equally as important to realize that eating out of boredom is NOT "true hunger." It's been one of my major attempts at eating like a normal person (eating ONLY when I'm hungry, & not when I'm boredom & only THINK I'm hungry).
And take a look at what you said in the beginning of your post "I feel hungry." Hunger -true hunger - should not be "a feeling" - it should be a FACT. There are soooo many times when I literally CANNOT tell the difference between TRUE hunger and HEAD hunger.
Drives me batty, it does!

But it's part of my journey. ~sigh.