This applies to hot baths and hot jacuzzi'.......

Rhonda Patrick----"The sauna robustly increases levels of heat shock 
proteins for up to 48 hours. Heat shock proteins play a preventative role 
in neurodegenerative diseases among other things and sauna use is 
associated with a 66% lower risk of Alzheimer's disease."

"I have a new paper out with my coauthor Teresa Johnson on how the sauna is 
a healthy lifestyle practice to increase healthspan!"

My facebook friends research scientist Rhonda Patrick and husband Daniel in 
San Diego, Calfornia....via their website ["Found My Fitness"] they 
proliferate videos of Rhonda's informational lectures and extensive 
interviews of world leading researchers in nutrition medicine and health. 

On their way toward the half a million youtube subscribers