Yes, I found this at a marathon. It was only 60 km but still it took me 4 hours to finish it. So the first hour I rode really competitive but then I had to slow down a bit. Still, when I noticed that a faster on the downhill competitor came behind me, I had to push harder on the uphills not to let her gain advance on the downhill. It was interesting that I found motivation and power to push harder, facing competition. Changing gears quickly and forseeing the terrain when passing river beds and small springs helped me a lot then. On the final kilometers on a flat land I was not burnt and I had the power to sprint. It was an interesting race and I'm proud that I didn't give up.

