Even if you’re good about getting to bed at a reasonable hour, that doesn’t mean you’re not pumping out excess cortisol. If you have a high-pressure job, super busy lifestyle, or tend to sweat the small stuff, there’s a good chance you’re regularly flooding your body with the gut-widening hormone. As White noted, this hormone makes junk food seem more appetizing, which is a big problem—and not only for the obvious reasons. When the body is under pressure, it metabolizes food more slowly, which can result in weight gain. To keep your cool under pressure—and maintain your newfound muscles—figure out what helps you unwind. Reading, yoga, deep breathing, and working out have all been found to decrease levels of stress. But hey, if heading to the driving range or playing a round of laser tag works for you, roll with it.