The sagittal plane is an anatomical term that refers to a vertical plane that divides the body into left and right sections. It runs parallel to the midline of the body, which is an imaginary line that runs down the center, creating symmetrical halves. This plane is essential in various fields, including anatomy, medicine, and physical therapy, as it helps in understanding body movements and positions. Movements that occur in the sagittal plane include flexion and extension, such as bending and straightening the elbow or knee. Exercises like squats and lunges primarily take place in this plane. Understanding the sagittal plane is crucial for professionals like physiotherapists and personal trainers when designing effective workout programs.