Table 1.

Activity sensors used in the study.

Device	Manufacturer	Weight	Sensors	Size
ActiGraph wGT3X-BT	ActiGraph LLC, USA	19 g	Acc*	4.6 × 3.3 × 1.5 cm
Fitbark2	Fitbark Inc., USA	10 g	Acc (total)**	4.1 × 2.8 × 1.4 cm

^*Acc, 3D-accelerometer;

^**Acc (total), 3D accelerometer readings taken multiple times per second and integrated over a 1-min epoch.