neijia_boxer wrote:What I learned in massage school that was also a Taiji and Qigong school:
Lymphaic fluids only flow upward in the legs
I don't think this is true really, maybe as a generalization/gross rule but can be misleading. Lymph and veins are both passive vasculature systems, where as arteries have strong muscles that pump blood, lymph and venous flow rely on pressure differentials to move. So while its true that the lymph all eventually moves to the upper left chest area before emptying into the veins, it takes detours along the way.
You can feel lymph and edema build up as a puffiness under skin and in between tissue layers with a developed sense of touch, and when it is stuck in an area (as is often with injuries like ankle sprains) the flow feels decreased and haywire. In normal areas, the lymph flow will feel like a slow, calm river gently in the direction of the left chest region. In areas where lymph is disturbed, the flow feels more swirly and back and forth, if there is any movement at all. Anyone can develop their sense of this flow by gently pressing down on skin till one feels a calmly moving fluid layer in the body. It is subtle but definitely there. Using gravity is a good tool to help clear the lymph and thus swelling out of an injured area.
But unless you really sprained your ankle very very badly, you shouldn't leave it in an elevated position always, or even most of the time. That is advice from a PT either a) by the book and does not fully understand the system's dynamics or b) someone who didn't care to take the time to explain it to you in detail. I'd guess that slow and gentle movements are more likely to increase and harmonize lymph flow in a chaotic area then rigid and ballistic movements, due to the soft and subtle nature of the flow.
Just my 2c.