Some things are not meant to be combined. I've read (can't remember where) that the most popular books are horse books and cookbooks, but to write a bestseller it might not be the smartest thing to combine those two themes. A Cookbook for horses? Cooking horse meat? I don't know.
Two of my greatest interests are exercise and painting. Painting the treadmill or making art while doing jump squats might not be a good combination... But, what works is reading this magazine while warming up on the bicycle :)
Have a great morning, I'll spend it in Örebro!