Why does being hungry sometimes feel “good” (or at least manageable) and other times it makes you feel nauseous or panicked?

Question

I’ve had some of my best workouts on a hungry stomach, but sometimes the exact same interval of fasting makes me feel nauseous and not at all interested in moving.

In: 50

Answer 1

Not an expert, but I’d imagine the feeling you might be thinking of is your blood sugar levels being low. If you have something earlier in the day that digests slowly like a salad with chicken or nuts on it, it would digest slower than something like a bag of potato chips. In the first case, you might eventually eventually get hungry but have ok blood sugar levels, but in the second scenario, you might feel shaky, nauseous, or panicked.