What do a bride-to-be, a couple booking a long-overdue cruise, and a career powerlifter with an upcoming competition have in common? Oftentimes, they all want (or need) to lose weight — fast. If you’re even vaguely familiar with health and fitness, you’ve probably heard the standard weight loss dogma more than enough times: Eat your vegetables , be more active, make sure you’re getting enough sleep each night, hit the weights, take this or that “magic” supplement , blah blah blah. Credit: Davizro Photography / Shutterstock Don’t get it twisted: For the most part, that’s all sound advice (you can probably keep your wallet shut about the diet pills, though). Increasing your physical activity and monitoring your nutrition are sure-fire ways of changing the number you see on the scale … eventually. But there are some situations where you need to change your body composition or body weight fast . While health is undeniably more of a marathon than a sprint, there are ways to kick...