The gastrocnemius is a large muscle located in the back of the lower leg, forming part of the calf. It has two heads, which originate from the femur and merge to form a single muscle belly that attaches to the heel via the Achilles tendon. This muscle plays a crucial role in movements such as walking, running, and jumping by enabling plantar flexion of the foot. In addition to its primary function, the gastrocnemius also assists in bending the knee. It is often targeted in exercises aimed at strengthening the calf muscles, which can improve athletic performance and overall leg stability. Stretching the gastrocnemius is important for preventing injuries and maintaining flexibility in the lower leg.