TY - JOUR
AU - CARSTENSEN, LAURA L.
AB - ABSTRACT Getting enough sleep, exercising, and limiting sedentary activities can greatly contribute to disease prevention and overall health and longevity. Measuring the full 24-h activity cycle—sleep, sedentary behavior (SED), light-intensity physical activity (LPA), and moderate-to-vigorous physical activity (MVPA)—may now be feasible using small wearable devices. Purpose This study compared nine devices for accuracy in a 24-h activity measurement. Methods Adults ( n = 40, 47% male) wore nine devices for 24 h: ActiGraph GT3X+, activPAL, Fitbit One, GENEactiv, Jawbone Up, LUMOback, Nike Fuelband, Omron pedometer, and Z-Machine. Comparisons (with standards) were made for total sleep time (Z-machine), time spent in SED (activPAL), LPA (GT3X+), MVPA (GT3X+), and steps (Omron). Analysis included mean absolute percent error, equivalence testing, and Bland–Altman plots. Results Error rates ranged from 8.1% to 16.9% for sleep, 9.5% to 65.8% for SED, 19.7% to 28.0% for LPA, 51.8% to 92% for MVPA, and 14.1% to 29.9% for steps. Equivalence testing indicated that only two comparisons were significantly equivalent to standards: the LUMOback for SED and the GT3X+ for sleep. Bland–Altman plots indicated GT3X+ had the closest measurement for sleep, LUMOback for SED, GENEactiv for LPA, Fitbit for MVPA, and GT3X+ for steps. Conclusions Currently, no device accurately captures activity data across the entire 24-h day, but the future of activity measurement should aim for accurate 24-h measurement as a goal. Researchers should continue to select measurement devices on the basis of their primary outcomes of interest.
TI - Twenty-four Hours of Sleep, Sedentary Behavior, and Physical Activity with Nine Wearable Devices
JF - Medicine & Science in Sports & Exercise
DO - 10.1249/MSS.0000000000000778
DA - 2016-03-01
UR - https://www.deepdyve.com/lp/wolters-kluwer-health/twenty-four-hours-of-sleep-sedentary-behavior-and-physical-activity-OY1TIBnJ9l
SP - 457
EP - 465
VL - 48
IS - 3
DP - DeepDyve
ER -