Which type of joint allows for movement in one direction?

The hinge joint is characterized by its ability to allow movement predominantly in one direction, similar to the opening and closing of a door. This type of joint is designed for flexion and extension, enabling actions such as bending and straightening. Common examples of hinge joints include the elbows and knees in the human body, which facilitate movements that occur along a single plane. This one-directional movement is a defining feature of hinge joints, making them distinct from other joint types that allow for more complex or multidimensional movements. Understanding the specific function of hinge joints is essential in fields such as fitness and rehabilitation, where proper joint mechanics are crucial for effective training and injury prevention.