Table 1.

Summary of the combined exhalation/inhalation rates of men and women of all ages from birth (lowest value) to 81 years or older during various activity intensities [21].

Activity intensity	The exhalation rate ${\mathit{Q}}_0$ or the inhalation rate $\mathit{p}$			$\mathit{\alpha }$ when $\mathit{q}=10$ L/s per person	$\mathit{q}$ L/s per person when $\mathit{\alpha }=0.01$
	L/min	L/s	Representativea L/s
Sleep or nap	3–5.2	0.05–0.09	0.06	0.006	6
Sedentary/passive activity	3.1–5.4	0.05–0.09	0.08	0.008	8
Standard activity	6	0.1	0.1	0.01	10
Light activity	7.6–13	0.13–0.22	0.20	0.02	20
Moderate activity	14–29	0.23–0.48	0.43	0.043	43
Intense activity	26–53	0.43–0.88	0.83	0.083	83

^aThe representative value is the median inhalation rate for all ages for the specific activity intensity. The highest value is for young people. A standard-intensity activity with an exhalation flow rate of 0.1 L/s is also included.