Running on an empty stomach?

It depends on how long your run is. I usually don't eat anything but have a cup of coffee and some water if my runs are under an hour. Anything more and I will have half a banana and some PB. I eat the rest of my breakfast after the run.

I eat nothing. Even on runs as long as 20 miles (this past weekend)
I make sure to hydrate and eat well the night before. The morning of is just 1 glass of water & I'm off. I'll take water & gels as needed during my run.

Depends on you! I find I get nasty cramps running on an empty or full stomach. Lots of water and a little bit of food seems to work best for me. However, first thing in the morning I do workouts on no food, as I have to wait an hour before eating following my thyroid pill. But I don't run in the mornings. I do harder workouts, lol! Ok, not always harder, but usually.

i don't like to eat before runs. makes me feel blah from my head to toe. At most I will have a banana or a piece of fruit before runs in the morning. I eat afterwards. Evening runs I don't eat anything 2 hours prior to the run.

Its different for everyone. Some people need food intake prior to cardio otherwise they get lightheaded.

I am kind of the same way. If I was going to run early in the morning, I wouldn't eat until after I was done. I also make sure I don;t eat anything closer than an hour to a run in the afternoon. I just tend to feel sluggish and almost nauseous if I run after eating.

I will sometimes in the afternoon eat a banana if I am really hungry and feel that I need something.

Again, do whatever works best for you!

Trying to run on an empty stomach or trying to run with too full a stomach are both sure fire ways for me to bonk a run. I try to leave two hours after a full meal or an hour after something smaller before I start a run.

Though, that can vary depending on circumstances. Like yesterday I'd had a full meal and planned on heading out two hours later. Life happened and I didn't hit the trail until almost three hours later. Just to play it more safe than sorry, I had a Greek yogurt just before I walked out the door. Did my 12.5 miles in sub-10 minutes per mile average pace and felt great the whole time.

So ultimately, it's going to come down to what works best for you. Unfortunately that means a bit of trial and error, and likely some bonked runs along the way. But if it helps you find your best meal timing for your runs, then it's all worth it for the long term.

For me, I'm fine running on an empty stomach if its under 4 1/2 miles.... anything over that I have 1/2 banana and a piece of toast with 1/2 tbsp of peanut butter. And I always have 1/2 a banana after I run regardless of how many miles I have run.

Took me quite a few runs before I figured out what does and doesn not work for me. Just keep trying different things until you find the right thing for you.