The video features a woman in a red shirt and black pants sitting on a chair. She is demonstrating how to perform a proper sit-up exercise. The woman is seated with her back against the chair and her feet flat on the floor. She then leans back slightly and brings her knees to her chest, engaging her core muscles. She repeats this motion several times, showcasing the correct technique for performing a sit-up. The video is shot in a well-lit room with a red floor, and the woman's movements are clear and deliberate.