Planks are the most popular and effective fat burning exercise. They can be easily performed and activate all your muscles, including your core, shoulders, glutes, etc. Planks are the best choice for people with weak knees because they put no pressure on knees. We have prepared systematic and scientifically-proven female fitness workout plans to help you lose weight, belly fat in a simple and easy way. No equipment or coach needed, you can easily do the weight loss workout at home or anywhere,