The news desk
Running With Allergies: What Helps During Pollen Season
Runners Connect pulls together multiple studies to lay out an order of operations for running through pollen season: grass pollen is lowest in the morning and peaks in the early evening in cities, so run early and move hard sessions indoors or to low-count days. For treatment, steroid nasal sprays beat antihistamine pills for congestion, runny nose, sneezing, and itch across 16 randomized trials, with non-drowsy antihistamines as a backup; older drugs like diphenhydramine reduce REM sleep and are not recommended during training.
This site provides a summary. Read the source original for the full article.