So, I am a twenty eight year old male. I feel like very recently I crossed some invisible line. Only two years ago, I could easily get by during the school year with 3-6 hours of sleep a night and moreover, I could make it until bedtime the next night without napping or experiencing a debilitating crash. Now I know that that was not the ideal conditions to subject my body to, nor do I expect to be able to do that forever. Time catches up to all of us...oi... But, it seem like now, even with plenty of sleep, I can only make 13 or fourteen hours at most before I crash. I know this is not normal. I do not exercise. I would like to start, but I don't want to get all jacked up either. I am healthy enough to start exercising. I am 6'2" and 165 lb.... so I am not totally out of shape. I just want to make some healthy improvements to my lifestyle. I quit smoking (after 10 years) two years ago and no alcohol in three or four years, so I would expect to feel awesome. But then again I don't eat that well.... What do you guys do (if anything) to build up your daily stamina? Should run? If so, how far should I start out with? 1 mile? Or as far as I can go? Man, I would love to start swimming..... but as silly as it seems, I am quite frightened by underwater life:rofl: I'll go in the ocean, but I don't do much romping about.... Anyway.... any ideas? Thanks! Sorry, I realize that this thread is a little all over the place!