Ask HN: Why does productivity and health feel diametrically opposed?

I usually find myself swinging between 2 moods; One is being productive, writing, shipping code, features, working on side projects...

At that time, I'll be also drinking, eating junk, tons of coffee, irregular sleep, staying inside for days, etc...

Then when I see that it is not very healthy, I will go to the gym, be regular, eat better and socialize. That leaves little to no energy to do more than minimum work.

It seems that I can't merge the good parts of each cycle and be social, healthy, while at the same time, productive and motivated.

Has anyone here been in this situation and figured their way out?