Table 3.

Laboratory assessment of supervised series of 4 physical activity tasks using electronic devices

Variable	Reference	Device 1 (n = 6)	Device 2 (n = 6)	Device 3 (n = 6)	Device 4 (n = 6)
Static task of supine lying
Duration of physical activity, min	0.0	0.0	0.0	0.17 ± 0.41	0.17 ± 0.41
Steps, number	0	7.83 ± 9.85	10.17 ± 9.11	6.33 ± 6.15	1.33 ± 3.27
Active tasks of stair-climbing
Steps, number	24	19.83 ± 13.42	28.50 ± 8.85	23.33 ± 3.20	22.50 ± 1.87
Active tasks of stationary cycling
Duration of physical activity, min	6.0	6.0 ± 0.0	3.75 ± 2.93	6.16 ± 3.18	5.88 ± 0.41
Active tasks of walking
Duration of physical activity, min	6.0	6.0 ± 0.0	7.75 ± 3.5	6.33 ± 1.03	6.33 ± 0.52

Data are presented as mean ± SD, unless otherwise stated. *p <  0.05, differences between measured data with electronic devices and reference data. Reference data of supervised series of 4 physical activity tasks were established a priori. Abbreviations: Device 1 Smartwatch, Device 2 Fitbit, Device 3 Smartphone (Android), Device 4 Smartphone (iOS)