Activities that improve joint flexibility include stretching, yoga, and Pilates. Stretching exercises, such as static and dynamic stretches, help elongate muscles and improve range of motion in joints, reducing the risk of injuries. Yoga promotes flexibility through various poses while also enhancing balance and strength. Pilates focuses on core strength and stability, contributing to better overall joint function. Incorporating these activities into a regular fitness routine not only enhances flexibility but also benefits posture and athletic performance.