I was reminded about hot weather riding yesterday. I decided to hit the woods around 230pm. The conditions were pretty stale. Temperature was around 95 degrees and the dew point in the low 70's. For you non weather nerds that's stifling. There was NO air movement either.
I decided I would push it a little bit after a 15 minute warmup..and then that's when the coaching mindset kicked in. Heart rate suppression. I just didn't have the punch. Core temperature elevated and that essentially shut down my ability to "rip it".
The best want prepare or offset this phenomenon is acclimatizing:
Keep Cool and enjoy the ride!