[localhost]

I wonder if enhanced operation of the lymphatic system might be causal to better mental health outcomes? The lymphatic system doesn't have a "pump", so it relies on muscle contraction to drive circulation. So more movement/exercise drives more lymphatic activity which may lead to better outcomes in people, especially if mental disorders are correlated with buildup of waste materials in the brain.

[lambdaba]

Well, the brain is a heavily vascularized organ. Proper sleep and exercise are both crucial for cleaning up waste products, and supplying nutrients and good blood flow.