Table 1. Average total DF for five ranges of particle diameters, calculated for male exercise on the basis of the data collected in paper by Hussein et al. (2019).

Size range number	1	2	3	4	5
Diameter [µm]	0.3–0.5	0.5–1.0	1.0–2.5	2.5–5.0	5.0–10
Average total DF male-rest	0.135	0.220	0.558	0.865	0.884
Average total DF male-exercise	0.096	0.128	0.354	0.742	0.877