Despite the pretentious title ("Karjakin on his preparation for Carlsen") the article offers nothing of the sort. Here's the big payoff:
Q: Can you tell us directly about your preparation for the match with Carlsen?
A: Well, I definitely won’t tell you about any chess variations, but we’re paying a lot of attention to walks in the open air and football. We’re also closely following the Euros in France. We watched the last match – Hungary 3:3 Portugal. Spectacular! Though you couldn’t help but think that perhaps it was an arranged draw (laughs).
So there you have it. Aside from opening variations, now you know that following soccer is a key element of preparation at the highest level. (Unless Karjakin loses badly, in which case we'll have to find out from Carlsen which sport one should watch instead, or maybe which team(s) ought to be followed.)