Losing weight in just 13 days seems unrealistic but this challenge outlines a plan to safely lose up to 10 pounds through a low-calorie diet and daily exercise. The diet limits calories to 1000-1200 per day through small, low-carb meals while workouts focus on cardio and strength training for 30 minutes each day. Following this strict but temporary routine aims to produce fast weight loss through calorie deficit and increased metabolism.