Final answer:
To prevent varicose veins, the most effective intervention for someone standing extensively for work is to wear graduated compression hose, as they provide support and promote blood circulation, preventing blood from pooling in the legs.
Step-by-step explanation:
The best intervention to prevent varicose veins for a client employed in a job that requires extensive standing would be to wear graduated compression hose. These are specially designed to apply graduated pressure on the legs, which is tighter at the ankles and gets lighter towards the knees and thighs. This helps to promote blood circulation and prevents the accumulation of blood in the legs that can occur with prolonged standing. It also relieves swelling and discomfort associated with varicose veins. In contrast, while low-heeled, comfortable shoes may provide some relief for leg fatigue, they do not offer the same circulatory benefits. Moving the legs often can help, but may not always be practical during long periods of standing. Likewise, the color and material of socks (such as white cotton) have little impact on varicose vein prevention compared to the pressure and support provided by compression hose.