"So I just fasted, and now I want to do intense cardio.... but I might run out of glycogen or blood sugar." I used to think like this, but then I actually trie

"So I just fasted, and now I want to do intense cardio.... but I might run out of glycogen or blood sugar." I used to think like this, but then I actually tried it and found that not only does a short (16-18 hour) fasted state not negatively impact my workouts but it improves my performance to exercise in a fasted state. Heavy squat/deadlift day at the gym ... 2 hours of BJJ ... 10 mile run ... these are all examples of things I do in a fasted state. You have no bloodflow diverted to stomach (or other digestive processes) you are fast and light on your feet and your energy is very steady. Would I embark on a triathlon or an ultra ? Of course not - but whatever fears I had about fasting throwing a monkeywrench into my training were unfounded.