As a warning to anyone reading: don't start running to lose weight. Running burns calories and can increase your calorie maintenance, but it will also make you very hungry. Weight loss is mainly about CICO, and you can't really outrun the fork. Since running can be very natural to humans as a form of movement, it also burns very few calories for the effort. I feel like weight training is a more fair calorie spender for the effort.

But running and taking care of myself does make me pick healthier options. Running helps me sleep, so I'm less tired and as a result, less hungry and prone to wanting unhealthy snacks. Fried greasy foods aren't great fuel for runs, so I'll naturally pick things like oatmeal, bananas, veggies etc. But be warned, many runners also love a post run beer so YMMV.