This article presents a 15-minute cardio workout that aims to burn fat without the need for any equipment. The workout is intense and designed to get the heart rate up and increase calorie burn. The routine includes exercises such as high knees, jumping jacks, mountain climbers, and burpees. Each exercise is to be done for 40 seconds, followed by a 20-second rest. The workout is suitable for individuals looking to incorporate a quick, effective fat-burning session into their fitness routine.