Low-level muscular contractions promote lymphatic fluid movement.

“But most people don't have access to a pool, so low-level muscular contraction from walking, diaphragmatic breathing. If you want to get a rebounder, a little trampoline, they're kind of fun. I think they're fun anyway. Hard to travel with. If you ever see people doing tai chi-type movements in the park in the morning, oftentimes they'll also include some shaking and things like that. Might look a little goofy, but there's a clear structural functional basis for why that would actually work.”