By now most of us know that leading a healthy lifestyle involves less fast food and more exercise. Nothing new there. But even if you have hopped on the wellness train, you may not be seeing your desired weight-loss results - not that that's the only reason to start being more mindful, of course. If you're good with feeling good, keep on doing your thing! But if you've been working out and eating kale just to lose those last 10 pounds, and, well, it's not happening, here are a few surprising reasons why.

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[Photo via @romeestrijd]