Treadmill Calibration of the Actigraph GT1M in Young-to-Middle-Aged Obese-to-Severely Obese Subjects

Table 2

Mean ± SD (95% CI) counts/min, individual MET values, and O₂ consumption at different treadmill speeds. All values are significantly different from the preceding values (𝑃<.05) (𝑛=41 at 2 and 5 km/h; 𝑛=35 at 6 km/h).

Speed (km/h)	Counts/min	Individual MET values	O2 consumption (mL/kg/min)	O2 consumption (L/min)
2	607 ± 468 (459 to 755)	2.82 ± 0.42 (2.69 to 2.96)	8.47 ± 0.98 (8.16 to 8.77)	1.00 ± 0.19 (0.94 to 1.06)
3	1425 ± 523 (1262 to 1588)	3.29 ± 0.53 (3.12 to 3.45)	9.84 ± 1.16 (9.48 to 10.20)	1.16 ± 0.23 (1.09 to 1.23)
4	2513 ± 650 (2311 to 2716)	3.88 ± 0.63 (3.68 to 4.08)	11.63 ± 1.42 (11.19 to 12.07)	1.37 ± 0.28 (1.29 to 1.46)
5	3729 ± 882 (3451 to 4008)	4.80 ± 0.86 (4.53 to 5.07)	14.40 ± 1.82 (13.83 to 14.97)	1.70 ± 0.37 (1.59 to 1.82)
6	4611 ± 1108 (4231 to 4992)	5.83 ± 0.81 (5.55 to 6.11)	17.81 ± 1.75 (17.21 to 18.41)	2.05 ± 0.34 (1.94 to 2.17)