Not pushing, but continuing, is the key?

Hot weather really made my body weird. From morning?!  I was tired, but I felt I wanted to ride even a little.
It turned out 10 min. warm up was not enough. Next 10 min. work out was hard and brought pain.  I gave up to keep speed around 8 mph.  Changing gear, and not push any more.  About 50 min. after I started riding, and just after stop and start action, my left toes got cramped.  Hurts!

I was going to ride very lightly and finish within 10 min.   But after that, I felt much better and pain was forgotten.  So I continued until over 1 hour 45 min.
Average speed: 8.5 mph, Max speed: 18.9 mph, and Distance: 15.3 miles!