Did the first mtb ride in a month, I figured all the beer, all the sausages in the previous week and 28c temp would a bit stressfull son I took it short and easy and stayed of the really technical stuff. I also packed light and left the knee pads and heavier helmet home and took the road lid which has much better ventilation. Luckily I didn't crash but did almost vomit on top of a steep singletrack climb.
I think my heartrate was above 150bpm most the 60 minutes.