Your alarm goes off at the same time it does every day: 6 a.m. You feel groggy and think briefly about how warm and cozy your bed is, but the feeling doesn't last long. You quickly roll over and pull on your sports bra, leggings, and an old T-shirt. You lace up your sneakers and head outside for your morning run, basking in the solo time you have ahead of you. It's just you, the crisp morning air, and the steady, meditative sound of your sneakers hitting the ground.
This is the morning routine of someone who craves exercise. And if your mornings look a lot like this, that's great—but many of us aren't there yet. If you want to figure out how to program your brain to crave working out, read on.