I'm currently doing a little N=1 on myself with adding a little cycling/cardio back in the mix. Interestingly enough, on my second ride (btw, just adding it a couple times per week JUST to see how I react) going about 22 miles of "hilly" riding (1 1/2 hours or so), I came back home afterward and did an afternoon/evening binge feast of just about everything in the house. Nothing too terrible, but some left over GF crackers from a shower over the weekend (damn those things!), WAY more fruit than normal, nuts galore, more fruit, some tuna, other lunch meats, and more nuts. Likely 3x+ the normal amount of food I would have throughout the day. I love to do this to mix it up and I do think doing a run or a ride once ever week or two is fine. I just know for me it might mean being on the "tread mill of life" to support this way of "exercise"...like I might be running/riding my way away from food - constantly.
I think our bodies are all different and react differently, but I'm thinking I like the intense type of workout a couple times a week with some sprints and lots of movement.