Generally speaking, good daily workouts reduce appetite and lead to better food choices. That does not prove a cause and effect relationship, though, because people who get on the fitness train focus on whatever their fitness needs are.
For example, people who do strength training daily commonly eat everything in sight whether they want it or not, and try to gain weight, both fat and muscle. For those interested in general fitness, though, not so much.
NYT (sorry): How exercise can affect our food choices and our weight.