I'll give you just one friend as an example: He was very thin in his youth and he still is thin today. But his diet was terrible -- sugar, fast food, never a h

I'll give you just one friend as an example: He was very thin in his youth and he still is thin today. But his diet was terrible -- sugar, fast food, never a home cooked meal unless it was microwaved, energy drinks (mountain dew, red bull). Because he wasn't fat he didn't look out of shape, in fact if you met him you'd say "he looks healthy". But that wasn't the case: He had a heart attack and developed diabetes. Also h left the startup life when he hit age 35 and hit these issues in his 40s -- so it's the bad habits of a lifetime. And the sad thing is that he works in tech, not in startups -- but his colleagues are all getting heart attacks. So I think it's a nerd thing rather than a startup thing. I also think that there is something unhealthy about sitting all day. And I now find myself trying to break that habit by going to a gym. If you're a twentysomething do yourself a favor: While you are still young try and get into good habits! Make the gym or some regular physical activity your friend. Make your own food at home, it's always going to be better than take out. And don't be afraid to get sleep. I'm trying to fix this stuff in my 40s and it's super hard.