I have a 45-mile round trip commute. Most weeks, I ride Mon, Wed & Fri. I keep a fairly comfortable pace, with a few miles of hammering mixed in, depending on how I'm feeling. I usually down a PowerGel at about the halfway point, and the Texas heat dictates that I drink two or three 25-oz bottles of water, each way.
Yesterday, I was heading home and felt a bit more tired than usual, so I used two PowerGels, (one at mile seven and the other at mile sixteen) and drank all three bottles of water. The humidity was pretty high and I was sweating like crazy. When I got to the house, I was absolutely exhausted. The strangest thing was that I could not stop shivering, (the thermostat was set at 78°). I ate dinner, grabbed a blanket and conked out on the couch.
It seems that there are no lingering effects, today.
Does this sound like a bonk, a carb-crash or simple dehydration? It felt eerily similar to a mild state of shock.