Experimental measurements and questionnaires during the study
Comfort Score and Symptom Score were assessed with mask (or without in the NM situation) before (pre) and after (post) ergometry and CPET, and Comfort Score also within the last 20 s of each load level. During the 4-h workplace examination, Comfort Score and Symptom Score were assessed 30 min before mask wearing (pre), 30, 60, 90, 120, 150, 210, and 240 min during mask wearing, as well as 30 min (post) after the end of mask wearing. Additionally, cognitive performance was assessed at the beginning and at the end of the workplace examination.