Time-Resolved Characterization of Indoor Air Quality due to Human Activity and Likely Outdoor Sources during Early Evening Secondary School Wrestling Matches

Figure 2

Respirable or coarse particulate matter (PM₁₀) count-to-estimated concentrations, mg m⁻³, for match #1 on 1/23/2019. Each team had ∼25 student-athletes and ∼5 coaches/staff (including the certified athletic trainers) present. Notes: values to the right of peaks above were the highest measured values (off y-axis). Varsity warm-up on mats started ∼17 : 50, then match (individual bouts) started ∼18 : 03 and ended ∼19 : 11; student-athletes and coaches completed clean-up/roll mats to ∼19 : 20.