I've been doing a lot of riding recently, so a story about "Bike" chess attracted my attention. It was one of a couple of variants tried during the Hoogeveen tournament in The Netherlands last week. Loek van Wely and Jorden van Foorest played each other while riding stationary bikes. Now I am not sure what the rules of "Bike" chess are (and the article on chess.com doesn't explain), but if the actual riding doesn't affect the play, then I am missing the point. One suggestion in the comments to the article was that the faster you ride, the less your time goes down, which does make sense to me. Just like chess boxing (or 'round the house' chess) there would be a trade-off between not tiring yourself out, and gaining an advantage via physical means.
The other form of "bike" chess that I would one day like to see is cyclists in one of the grand tours (eg The Tour de France) playing blindfold chess in the peleton. I am sure that there would be more than a few professional cyclists who are chess players, and a game of blindfold chess (with the players shouting the moves to each other), would help break up the monotony of staring at the bottom of the cyclist in front of you.