If you would like to learn more about the benefits of ice baths or would like some breathing exercises, check out: Dr Rhonda Patrick, Barbell Shrugged, and Wim Hof.  
Dr. Rhonda Patrick: Cold Shocking the Body (download), Website (link)  
Barbell Shrugged:  Ice Bath Science (link)  
Wim Hof: Website (link), YouTube (link)