Your body’s lymphatic system is, like the internet, a series of tubes. They’re sort of built like your veins but under even lower pressure so they rely on the movement of your muscles to squeeze the lymphatic fluid inside them around.

Lymphatic fluid carries a lot of weird immune shit around and is very important, but it’s also a prime wellness pseudoscience target. If moving lymph around was the primary benefit of exercise then laying down in a pressure chamber and turning it up and down would do the same thing.

Exercise does move lymph around but much more importantly it activates a zillion beneficial metabolic pathways in pretty much every other tissue in your body. It’s essentially the stimulus that tells your whole body “hey you need to be able to function so go ahead and do that.” It’s also incredible for ADHD, I sleep like boiled dog shit if I don’t exercise and it makes brain fog infinitely worse.