30 here
Get back to me when you're creeping up on fifty.
Truthfully, I have mixed results when it comes to drinking these days. Sometimes, it's fine. I drink a few beer, get a nice buzz and wake up totally fine. It's really only once or twice I had the situation I mentioned above where I hardly drank anything and woke up hungover anyway. In those cases, I didn't chug a bunch of water because I assumed since I wasn't feeling the effects at all, I'd be fine. If I am buzzed or verging on drunk, then I will chug a liter or something. Though for me, it's 50/50 on whether that prevents a hangover. I don't like those odds. It just seems more and more like the short buzz and euphoria it brings more and more often isn't worth the chance of ruining the next day. Especially given how much shittier your system gets at handling this stuff as you get older.
I am not out of shape either.
Maybe the evidence is anecdotal, but I've lived in Korea for 20 years, and there's always a huge new, self-contained apartment complex going up nearby. If anything, they've ramped up production in that time. While older population centers are left to decline. Maybe not in Seoul which is shoulder-to-shoulder apartment complexes already, but the smaller cities are full of decaying apartment complexes since they put them up, then completely fail to maintain them as they know their market is full of people who will move into the next complex since "gotta have the latest and greatest" is a problem here.