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editorial
. 2018 Jan 2;11(7):503–515. doi: 10.70252/NJQX2719

Table 2.

Summary table of current investigations determining validity of various wearable technology devices compared to a criterion measure for energy expenditure.

Reference Subjects Activity Validity – Agreement (95% confidence interval range) Validity – Correlation (r-values) Validity – MAPE (%)
Chowdhury et al. 2017 (3) N = 30 (15 male, 15 female) 27±6 yrs 24-min activities of daily living 64-min exercise (10-min each: treadmill walking, walking with bags, cycling, treadmill running) Apple Watch (0.2±3.4) > Fitbit Charge HR (0.3±4.6) > Microsoft Band (−1.8±3.9) > Jawbone UP24 (−0.9±5.4) kcal/min Apple Watch (0.935) > Microsoft Band (0.879) > Fitbit Charge HR (0.825) > Jawbone UP24 (0.800) Apple Watch (27±19%) < Jawbone UP24 (36±14%) < Fitbit Charge HR (36±22%) < Microsoft Band (40±16%)
Nelson et al. 2016 (13) N = 30 (15 male, 15 female) 10 each in age groups 18–39 yr, 40–59 yr, 60–80 yr 5-min ambulatory/exercise of increasing intensity including: walking in hallway, treadmill walking, cycling, hallway jog, treadmill jog Fitbit One (159.0 to 127.4) > Fitbit Flex (180.7 to 147.0) > Fitbit Zip (189.4 to 155.1) > Jawbone UP (162.6 to 127.8) kcal - WALKING:
Jawbone UP (24%) < Fitbit One (31%) < Fitbit Flex (53%) < Fitbit Zip (68%)
JOGGING:
Fitbit One (22%) < Fitbit Flex (35%) < Fitbit Zip (37%) < Jawbone UP (46%)
Wallen et al. 2016 (16) N = 22 (11 male, 11 female) 24.0±5.6 yrs 5-min sedentary, 3-min stages walking, 3-min stages cycling Samsung Gear S (−73.5 to 21.3) > Fitbit Charge HR (−137.0 to 17.3) > Apple Watch (−219.7 to −12.9) > Mio ALPHA (−266.7 to 65.7) kcal Samsung Gear S (0.86) > Fitbit Charge HR (0.64) > Mio ALPHA (0.46) > Apple Watch (0.16) -
Woodman et al. 2017 (17) N = 28 (20 male, 8 female) 25.5±3.7 yrs 10-min sedentary, 5-min activities increasing intensity: treadmill walking, overground walking, overground running, overground cycling, laboratory cycling Garmin VivoFit (93.8 to 271.8) > Withings Hip (56.7 to 282.8) > Withings Shirt (59.8 to 286.2) > Withings Wrist (142.7 to 382.6) > Basis Peak (−290.4 to 233.1) kcal - Basis Peak (27.2%) < Withings Pulse Hip (40.3%) < Withings Pulse Shirt (41.4%) < Garmin VivoFit (44.6%) < Withings Pulse Wrist (63.7%)