[donkeyd]

While I somewhat agree with you, I'd like to add that this is not a necessity.

If you don't want to be serious about fitness, because you just want to be healthier, just do the lifting. This will already be a great improvement. If you become used to it, feel better about yourself and feel like there's more room for improvement, then start watching you diet.

[beachstartup]

yeah well, i guess if you're not serious then by definition you should just eat whatever you feel like. do lift though. it's not just for bros!

seriously though... most of us tech types here on hn start lifting only after our body starts to decline after years of abuse, in our early 30s. my productivity really took a hit. which is as good a reason as any to start.