"The Navy classified the protocol in 2009 and kept it secret until 2023." Hmm. Maybe. But my dad who was a WWII Marine in the South Pacific shared this secret with me when I was a kid. Not even sure he learned this in the Marines. Made me think he picked this up in Catholic school.
The 7-second cold wrist rinse was tested on 3,000 soldiers after combat simulations.
— The Fourth Musketeer (@IV_Musketeer) June 2, 2026
Cortisol dropped 52% within 90 seconds. Heart rate fell an average of 22 beats per minute. The Navy classified the protocol in 2009 and kept it secret until 2023.
The mechanism is radial… pic.twitter.com/Qpo6EzWqMM
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