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

Figure 5

Respirable or coarse particulate matter (PM₁₀) and fine particulate matter (PM_2.5) count-to-estimated concentrations, mg m⁻³, and suggested impact of student-athlete activities, match #2, 1/30/2019. Each team had ∼25 student-athletes and ∼5 coaches/staff (including certified athletic trainers) present. Notes: values to the right of the peaks above were the highest measured values (off y-axis). The blue arrows were takedown maneuvers; the green arrows were pins; and the purple arrows were when a takedown maneuver led to a pin. For 1/30/2019, junior varsity match finished ∼17 : 40, varsity warm-up exercises on mats to ∼18 : 00, then match (individual bouts) started ∼18 : 00 and ended ∼19 : 24, and student-athletes and coaches clean-up/mats rolled ∼19 : 24–19 : 29 (data loggers stopped by 19 : 30 on study days).