happened at my mtb race last night.
just didn't have it. oh well. still had enough points to win the series.

When it happens to me, I just slow down and enjoy the ride and scenery. I sometimes feel racy roadies and MTB riders don't enjoy the environment. It's always rush, rush, rush... I already have enough rush, rush, rush in my professional life.

I like to HTFU! a lot, but I really like to relax and enjoy about 20%-30% of my seat time any given week.

If you feel slow or tired, I'd just take that time to gather yourself and enjoy nature.

happened to me this morning, felt fine when I left the house then when I crested the top of a hill 6 miles away I felt way more tired than usual and turned around.

i wish i could explain, but somehow just not a morning person. the same goes with running: i can go for eight miles in the evening but i'll struggle through four in the morning. most likely something with low blood sugar in the morning