Table 2.

Measured (Cosmed K4b²) and predicted MET_RMR (mean (± SD)) and root mean squared error (RMSE) for eight structured activities.

	Cosmed K4b2	Crouter Vector Magnitude 2-Regression Model		Crouter Vertical Axis 2-Regression Model		Freedson Child Equation		Treuth Equation		Trost Equation		Puyau Equation
	Mean (SD)	Mean (SD)	RMSE	Mean (SD)	RMSE	Mean (SD)	RMSE	Mean (SD)	RMSE	Mean (SD)	RMSE	Mean (SD)	RMSE
Supine rest (n=72)	1.00 (0.00)	1.01 (0.07)	0.07	1.03 (0.24)	0.24	1.01 (0.67)	0.07	1.02 (0.12)	0.12	1.04 (0.21)	0.21	1.07 (0.34)	0.34
Playing on a desktop computer (n=43)	1.34 (0.48)	1.03 (0.13)*	0.53	1.00 (0.00)*	0.59	1.01 (0.05)*	0.56	1.01 (0.08)*	0.55	1.00 (0.03)*	0.57	1.04 (0.25)*	0.50
Playing board games/cards (n=43)	1.42 (0.50)	1.11 (0.24)*	0.59	1.09 (0.42)*	0.65	1.07 (0.26)*	0.59	1.10 (0.37)*	0.60	1.14 (0.56)	0.68	1.13 (0.42)	0.65
Light cleaning (n=43)	2.93 (1.25)	2.65 (0.48)	1.22	2.84 (0.70)	1.25	1.66 (0.65)*	1.58	1.88 (0.70)*	1.37	2.15 (0.99)*	1.32	2.71 (0.61)	1.59
Jackie Chan (n=43)	4.69 (1.41)	3.99 (0.95)	1.72	3.97 (0.83)	1.68	3.11 (1.35)*	2.00	3.12 (1.23)*	1.92	3.48 (1.40)*	1.71	3.98 (1.20)	2.02
Wall Ball (n=43)	4.96 (2.29)	4.13 (0.79)	2.21	3.70 (0.44)*	2.50	2.75 (1.10)*	2.70	2.81 (1.03)*	2.65	3.17 (1.20)*	2.36	3.64 (0.81)*	2.77
Walking (n=61; avg. 71.7 m·min−1)	4.12 (1.52)	3.81 (0.64)	1.59	3.52 (0.52)	1.60	3.85 (1.47)	1.16	3.74 (1.41)	1.15	4.06 (1.51)	1.12	4.39 (0.62)	1.79
Running (n=59; avg. 113.1 m·min−1)	6.67 (2.52)	5.54 (0.96)*	2.64	5.55 (1.48)*	2.64	5.73 (2.30)*	1.96	5.30 (2.08)*	2.18	5.76 (2.21)*	1.90	6.00 (1.12)*	3.14
Average for all activities	3.38 (2.47)	2.91 (1.77)*	1.32	2.84 (1.76)*	1.39	2.59 (2.03)*	1.33	2.55 (1.87)*	1.4	2.77 (2.07)*	1.23	3.03 (1.92)*	1.60

MET_RMR, metabolic equivalents (measured VO₂ divided by measured lying RMR VO₂);

^*Significantly different from Cosmed K4b² (P < 0.05),