"I'd speculate that lymphatic flow efficiency has local and systemic elements that contribute to it (and so your leg muscles moving lymph help your overall lymp

"I'd speculate that lymphatic flow efficiency has local and systemic elements that contribute to it (and so your leg muscles moving lymph help your overall lymphatic system health)." Lymph system helps clear waste / ISF from the brain. Overall lymphatic circulation improvement from increased activity would intuitively improve lymphatic clearance from the brain. That would be true if there was direct lymphatic clearance or some indirectly / osmotic gradient driven process (I don't know which, or neither, is the case).