Ah, summer. A time of vacations, barbecues and abundant sunshine. No wonder employees report being happiest during these months. And that happiness might be just the kick they need to jump into a new health and fitness regime come fall.

So says the End-of-Summer Checkup, a survey from digital health company Rally Health, Inc. that quizzes Americans about how they feel about how summer affects their health routines, including changes in dietary and fitness routines, as well as end-of-summer mood shifts and their perspective on autumn.