Anecdotally, low blood sugar only seems to bother me when I am not physically fit. Similarly, I only get hunger pangs when I've eaten too much and haven't exercised. After a few weeks of steady endurance training both of these things went away. If I am really hungry, it presents less as pain or weakness than a very empty stomach. If I'm not training regularly, my stomach is rarely ever that empty. I'm always hungry, which leads to constant snacking and eating big meals. Exercising even lightly on a regular basis, there's a much stronger feedback loop where your body has an opportunity to let you know you've over eaten or eaten a poor mix of nutrients.
All of this is probably limited to light resistance/endurance training. This sort of goes out the window while lifting weights, at least for me. Then its very hard for me not to eat a ton. I think the fascination with protein is totally misguided though. Some people think they need 200g/day when probably 30g is sufficient.
One thing I really embraced in college was ketosis. I hardly ate, aside from a few well earned feasts. But its extremely hard to maintain if you don't have the freedom to work out multiple times a day and carbs are a convenient and cheap source of calories.
