OK two things:
1. I AM "that guy" you mention. LOL Check out my latest project, which I spent four months working on, 7 days a week (while maintaining my primary network/business, too):
www.eroticrevenue.com
(or click the ad you see here on GFY)
But what if it, you know, FAILS? Well guess what? I've got ANOTHER project I'm just about to begin (May 1). And what if THAT fails? There will be another project then, and another, and another....
2. You DO need time to recover when it comes to phyisical goals. You even said the great kickboxer who died at 43. Don't be him, take a day or two to recover. 'Pushing' and 'how bad do you want it' should be a lifelong constant therefore a day or two to let your body recover is smart, not being a slacker.