I am someone who cannot run on an empty stomach (or do anything for that matter).
I have tried a variety of things but energy gels with water work best for me. Gu is the brand that I use the most often.
Recently I tried PowerBar gels and I like them too. (They are a little bit more liquidy than Gu.)
I also tried a Clif Shots geI before my last 5K. It was also more liquidy (and messy). They sell them in supermarkets so that is a plus (4 for $5).
Click HERE for a comparison chart. (I use them because of taste and didn’t realize how different they are… Power Gel has a lot more sodium than the others.)
I take energy gels before any race and before runs that I do in the morning. (Since they have caffeine, I do not take any later in the day.)
During my long runs or races, I take one every 4 miles or 45 minutes…with water. So far I have not had any stomach issues.
Happy Running! What do you take for energy when running?