@luckytran That's what trips me up about elite athletes and their trainers. These are people for which getting the slightest shaving of a percentage of performance improvement matters, where every 0.001% counts. They will fine-tune sleep, diet, nutrients, screen time, mental health, and dozens of other ticky-tack details for PEAK physical performance, yet their coach doesn't tell them to put on a mask, a mask proven to protect their years of hard work from being lost to the ravages of a virus.