I raced a road 5k this morning and was disappointed to run a good 30+ seconds slower than I was expecting given my training (I've been running for 20 years so I have a lot of data on workouts/races). Legs felt great, HR was fine, but I was struggling to get enough oxygen. My sinuses were definitely closed up so I was completely mouth breathing. This happens to me from time to time. I took a Claritin, but it didn't help at all today and where I live things are blooming like crazy.
Does anybody else experience similar issues? Does anything work for you? Or should I just keep trying different allergy meds?