1. Your Legs Lose the Pump That Moves Blood Back to Your Heart
Every time you walk, your calf muscles squeeze your leg veins and push blood upward against gravity — doctors call it the calf muscle pump. Without it, blood doesn't return to your heart properly.
Sit at a desk for three hours? The pump stops. Drive two hours? Same. Six hours on a plane? Again. Blood pools in the lower legs. Pressure builds. Fluid leaks into surrounding tissue.
That swelling, heaviness, and sock-ring at the end of the day isn't aging. It's your venous return system failing — because your legs stopped moving.

