A "straight leg" refers to a position where the leg is extended fully without any bends at the knee. This position is often used in various physical activities, including stretching, yoga, and certain exercises. Maintaining a straight leg can help improve flexibility and strengthen the muscles in the legs. In fitness, the straight leg position is commonly seen in movements like leg raises and deadlifts. It is important for proper form to avoid injury and maximize effectiveness. Additionally, straight leg stretches can target the hamstrings and calves, promoting overall leg health and mobility.