The Bikini Body Guide (BBG) is a fitness program created by Australian personal trainer Kayla Itsines. It focuses on high-intensity interval training (HIIT) and strength workouts designed to help individuals improve their fitness levels and achieve a toned physique. The program typically spans 12 weeks and includes a combination of resistance training and cardio exercises. In addition to workout plans, the BBG also emphasizes nutrition and healthy eating habits. Participants receive meal plans and recipes to support their fitness goals. The program is popular among those looking for a structured approach to fitness, often shared through social media platforms like Instagram.