: calves; Latin: sura) is the back portion of the lower leg in human anatomy.

[9] A small study of runners found that wearing knee-high compression stockings while running significantly improved performance.

In Spain, a study of 22,000 persons 65 or older found that a smaller calf circumference was associated with a higher risk of undernutrition.

[11] In France, a study of 6265 persons 65 or older found an inverse correlation between calf circumference and carotid plaques.

The second category includes movements that maintain a bent knee, such as seated calf raises.