I work from home at my desk. I run ~8-9 miles a week and hit the gym to lift ~2 times a week. Doing barbell exercises, pushups, pullups, etc.
I'm in decent physical shape, but I can't for the life of me figure out how to have a flat tummy since I was 20. It's starting to feel pathological, and it's bothering me.
I've been having a green smoothie in the morning, lunch is usually some protein and carbs with some greens, and dinner usually the same. Sometimes I skip breakfast.
What can I do to solve this issue?