Same applies to my experience biking. I’m new to any kind of cycling, and coming off approx 1 yr of not exercising regularly (previously in moderately unfit shape). Got a hybrid fixed gear in Sep & the mask enabled multi-hour rides even once the temp dropped below to daily high of low 40s °F in Nov. I’m pleasantly surprised to report that my season hasn’t had to stop for the winter at all! I credit the mask.