Question

Whichever makes you feel better.

You have to experiment and find out whats right for you. I prefer to exercise on an empty stomach if possible or else I get cramps. If I'm doing a long run and need to eat beforehand, I can tolerate an apple and some milk really well.

I only learned this through experimenting. There's no right or wrong answer here.

I go by the P90x plan. If you eat before wait an hour before working out. My schedule makes that hard so I work out first, eat, shower, relax. Ahhhhhhhhh. Lol

I always run better on carbs and sugar!