. 2014 Jul 15;2:e482. doi: 10.7717/peerj.482

Table 2. Measured rates of oxygen consumption $(\dot{V} O_{2})$ and metabolic rates (mean ± SD) for the different test conditions.

Day	Velocity (m/s)	Angle (degrees)	Grade (%)	$\dot{V} O_{2}$ (ml/(kg min))	Metabolic rate (W/kg)
1	Standing	–	–	4.3 ± 0.5	1.5 ± 0.1
	2.0	0	0	24.5 ± 1.5	8.3 ± 0.4
		1	1.7	26.1 ± 1.2	8.9 ± 0.4
		2	3.5	29.1 ± 1.3	9.9 ± 0.4
		3	5.2	31.6 ± 1.8	10.8 ± 0.5
		4	7.0	34.3 ± 1.1	11.7 ± 0.4
		6	10.5	40.5 ± 1.8	13.9 ± 0.6
		8	14.1	47.1 ± 2.1	16.3 ± 0.7
2	Standing	–	–	4.7 ± 0.4	1.6 ± 0.1
	2.5	0	0	29.0 ± 1.3	9.8 ± 0.4
		1	1.7	31.6 ± 1.4	10.7 ± 0.4
		2	3.5	35.4 ± 1.4	12.0 ± 0.4
		3	5.2	38.3 ± 1.2	13.1 ± 0.4
		4	7.0	42.2 ± 1.0	14.4 ± 0.3
	3.0	0	0	35.3 ± 1.6	11.9 ± 0.5
		1	1.7	38.9 ± 2.0	13.2 ± 0.6
		2	3.5	43.1 ± 1.8	14.7 ± 0.6
		3	5.2	47.1 ± 1.7	16.1 ± 0.5
4		7.0	51.6 ± 2.2	17.8 ± 0.7

Table 2. Measured rates of oxygen consumption V˙O2 and metabolic rates (mean ± SD) for the different test conditions.