Do football players get colds in the winter while playing? How can they handle the cold while running and so? - Quora
5 ways NFL athletes keep from freezing on the field
NFL Player Damar Hamlin Goes Into Cardiac Arrest
One reason Mac Jones looked so calm in his NFL debut: His breathing technique - The Boston Globe
David Carr column: Cold is just cold
Exercise When Sick: How to Make the Best Call - Orange County Pediatric and Sports Medicine Practice
Lungs Burning When Running Why My Lungs Hurt in the Cold
Athletes with long-haul covid struggle to return from the sidelines - The Washington Post
Improve Football Stamina With Breathing Training
Rennes star Martin Terrier becomes latest player to be forced off with breathing issues - Daily Star