Same experience. When I run regularly (one to two times a week) I have no desire for sugary or fatty foods. Instead I crave fresh fruit and vegetables.

I am sure this is a type of hibernation reflex, where, with inactivity, the body wants stuff that packs a lot of energy for storage (dense with fat and/or sugar).

Consequently, I focus only on getting exercise and let my diet take care of itself - it always does.