Sit-up aids are fitness equipment that can help people effectively engage in different forms of exercise and fitness. The design purpose is to provide appropriate support and assistance to the user's body during the sit up process. This product can be folded and stored, saving equipment. The push up board allows people to perform push ups in a precise and controllable manner, reducing the risk of injury and improving exercise effectiveness. Through the push up board, users can exercise their upper body strength, core stability, and endurance, making it an ideal tool for fitness enthusiasts and athletes.