The soleus is a muscle located in the lower leg, beneath the larger calf muscle known as the gastrocnemius. It plays a crucial role in walking, running, and maintaining balance. The soleus helps to stabilize the ankle and is primarily responsible for plantar flexion, which is the movement that points the toes downward. This muscle is particularly important for activities that require endurance, such as long-distance running and standing for extended periods. The soleus is often engaged during low-intensity activities, making it essential for overall leg strength and mobility. Proper conditioning of the soleus can help prevent injuries and improve athletic performance.