What is a key function of compression hose?

Compression hose are specifically designed to apply graduated pressure to the legs, which helps to promote better blood circulation. The primary function of these garments is to prevent swelling and reduce the risk of venous disorders by assisting blood flow back toward the heart. This upward movement of blood helps alleviate issues like edema and aids in decreasing the likelihood of blood clots.

The other options do not accurately represent the main purpose of compression hose. While increasing leg muscle strength is beneficial for overall fitness, it is not an effect of wearing compression stockings. Cooling the legs during exercise is not a function of compression hose; they are designed to provide support rather than ventilation. Additionally, compression hose are not intended to provide insulation against cold, as their primary role revolves around circulation, not temperature regulation. Therefore, the emphasis on preventing swelling by facilitating upward blood flow is the key aspect that defines the efficacy of compression hose.