AFAIK, movement. Like, there’s parts of your elbow that get pretty much zilch for blood flow. Movement literally gets the fluids “pumped” in those places. Also,

AFAIK, movement. Like, there’s parts of your elbow that get pretty much zilch for blood flow. Movement literally gets the fluids “pumped” in those places. Also, something-something your body will produce the right fluids when “prompted”, just like it’ll grow muscle when “prompted”.