Have you ever heard of Postural Orthostatic Tachycardia Syndrome?  It's also called POTS!  We tell the story of how we discovered that one of our athletes deals with this syndrome and what we have done to deal with it during the highly demanding club volleyball season.  This IS the hydration episode.  Also, Alison almost lost a finger one time.

https://my.clevelandclinic.org/health/diseases/16560-postural-orthostatic-tachycardia-syndrome-pots