"The most important component to health, wellness, and longevity, is your nutrition," Morelli says. If you're a night worker and spend your non-busy hours eating donuts and chips, you're not going to feel up to hitting the gym once you're off the clock—mentally or physically.
"It’s absolutely critical, even more so on those days when you just don’t have it in you, that you stay dialed in to your nutrition," he adds. Eating right will prime your body with the right kind of fuel to perform well in the gym, but also keep you from getting set back if you need to miss a workout. You'll find yourself in a better state of mind, too; and, besides, mix a crappy day of eating and no training session, and you're setting yourself up to derail your efforts.