HOS-N53 Seated Calf Raise is a popular exercise that targets the calf muscles. It is performed by sitting on a calf raise machine with the feet placed on a platform and the knees bent at a 90-degree angle. The exercise involves raising the heels by extending the ankles as high as possible and then lowering them back down in a controlled manner. This movement primarily works the gastrocnemius and soleus muscles, which are located in the calf area.