Morning Exercise + Raw

Just thought I'd throw this question I have out there...

What do you guys usually eat in the morning before you exercise, if anything? I've read such conflicting things. Some say that exercising on an empty stomach burns fat cells because you haven't got any food-fuel to run on-and some say that it puts your body into starvation mode and makes your metabolism lag.

I am so confused! I usually have a green smoothie for breakfast but I feel like that'd be a bit heavy before my morning cardio, like I'd get a side stitch or something.

Please, I'd love to hear what y'all know about it!