As a former competitive CrossFit athlete, Katherine Norman sees herself as a healthy person. Over the last year, she also saw herself as a smoker.

“During the pandemic, I reverted to old coping skills, like smoking,” she says. “I had this cognitive dissonance because I thought of myself as a healthy person and, at the same, I was smoking up to a pack a day.”

She recently quit smoking with the help of tobacco cessation study...