Strange occurance! First let me say that I have been strugling to make riding time (family and work obligations), however, this experience came so soon in my Satruday morning ride that it took me by surprise.
The temperature was about 86 degrees. I rode about 10 miles over moderately hilly terain after eating a bowl of cerial about three hours earlier. The one item that may be our of joint was that I was going on four hours of sleep on Friday night (I usually get about six). When I hit mile 10, and the biggest hill of the ride, I got about 1/4 way up and had to stop. Rested for about three minutes, and finished the hill, stopping at the top for a Cliff bar and drank a fair amount of sports drink.
I then got on my bike to find that my legs were prety well gone, so I turned around and slogged my way home.
I am carefull to drink quite a bit when I ride (I sweat profusely when riding even in mild heat and humidity) and my sports drink includes carbs, potasium and salt. I carry three water bottles, one with sports drink, two with water. I go through one water bottle about every 10 miles.
Can someone suggest where I might have gone rong?