scholarly journals Preliminary Validation Study of Consumer-level Activity Monitors and Mobile Applications for Step Counting under Free Living Conditions

2017 ◽  
Vol 6 (1) ◽  
pp. 26-33 ◽  
Author(s):  
Manolis Adamakis
Keyword(s):  
Validation Study ◽  
Mobile Applications ◽  
Living Conditions ◽  
Free Living ◽  
Activity Monitors ◽  
Preliminary Validation ◽  
Step Counting ◽  
Free Living Conditions

Physical Activity Monitor Accuracy for Overground Walking and Free-Living Conditions Among Pregnant Women

2020 ◽  
Vol 3 (2) ◽  
pp. 100-109
Author(s):  
Christopher P. Connolly ◽  
Jordana Dahmen ◽  
Robert D. Catena ◽  
Nigel Campbell ◽  
Alexander H.K. Montoye
Keyword(s):  
Physical Activity ◽  
Pregnant Women ◽  
Living Conditions ◽  
Overground Walking ◽  
Third Trimester ◽  
Free Living ◽  
Activity Monitors ◽  
Step Counting ◽  
Physical Activity Monitors ◽  
Free Living Conditions

Purpose: We aimed to determine the step-count validity of commonly used physical activity monitors for pregnancy overground walking and during free-living conditions. Methods: Participants (n = 39, 12–38 weeks gestational age) completed six 100-step overground walking trials (three self-selected “normal pace”, three “brisk pace”) while wearing five physical activity monitors: Omron HJ-720 (OM), New Lifestyles 2000 (NL), Fitbit Flex (FF), ActiGraph Link (AG), and Modus StepWatch (SW). For each walking trial, monitor-recorded steps and criterion-measured steps were assessed. Participants also wore all activity monitors for an extended free-living period (72 hours), with the SW used as the criterion device. Mean absolute percent error (MAPE) was calculated for overground walking and free-living protocols and compared across monitors. Results: For overground walking, the OM, NL, and SW performed well (<5% MAPE) for normal and brisk pace walking trials, and also when trials were analyzed by actual speeds. The AG and FF had significantly greater MAPE for overground walking trials (11.9–14.7%). Trimester did affect device accuracy to some degree for the AG, FF, and SW, with error being lower in the third trimester compared to the second. For the free-living period, the OM, NL, AG, and FF significantly underestimated (>32% MAPE) actual steps taken per day as measured by the criterion SW (M [SD] = 9,350 [3,910]). MAPE for the OM was particularly high (45.3%). Conclusion: The OM, NL, and SW monitors are valid measures for overground step-counting during pregnancy walking. However, the OM and NL significantly underestimate steps by second and third trimester pregnant women in free-living conditions.

Invariance of Wearing Location of Omron-BI Pedometers: A Validation Study

2010 ◽  
Vol 7 (6) ◽  
pp. 706-717 ◽  
Author(s):  
Weimo Zhu ◽  
Miyoung Lee
Keyword(s):  
Validation Study ◽  
Absolute Error ◽  
Activity Monitor ◽  
Error Rates ◽  
Living Conditions ◽  
The Body ◽  
Validity And Reliability ◽  
Free Living ◽  
Climbing Stairs ◽  
Free Living Conditions

Background:The purpose of this study was to investigate the validity and reliability evidences of the Omron BI pedometer, which could count steps taken even when worn at different locations on the body.Methods:Forty (20 males and 20 females) adults were recruited to walk wearing 5 sets, 1 set at a time, of 10 BI pedometers during testing, 1 each at 10 different locations. For comparison, they also wore 2 Yamax Digi-Walker SW-200 pedometers and a Dynastream AMP 331 activity monitor. The subjects walked in 3 free-living conditions: a fat sidewalk, stairs, and mixed conditions.Results:Except for a slight decrease in accuracy in the pant pocket locations, Omron BI pedometers counted steps accurately across other locations when subjects walked on the fat sidewalk, and the performance was consistent across devices and trials. When the subjects climbed up stairs, however, the absolute error % of the pant pocket locations increased significantly (P < .05) and similar or higher error rates were found in the AMP 331 and SW-200s.Conclusions:The Omron BI pedometer can accurately count steps when worn at various locations on the body in free-living conditions except for front pant pocket locations, especially when climbing stairs.

Validity of activity monitors worn at multiple nontraditional locations under controlled and free-living conditions in young adult women

2015 ◽  
Vol 40 (5) ◽  
pp. 448-456 ◽  
Author(s):  
Hideaki Kumahara ◽  
Makoto Ayabe ◽  
Misato Ichibakase ◽  
Akari Tashima ◽  
Maiko Chiwata ◽  
...  
Keyword(s):  
Young Adult ◽  
Vigorous Physical Activity ◽  
Real Life ◽  
Living Conditions ◽  
Practical Reasons ◽  
Adult Women ◽  
Young Adult Women ◽  
Free Living ◽  
Activity Monitors ◽  
Free Living Conditions

The purpose of this study was to examine the validity of counting steps and computing indices of moderate-to-vigorous physical activity (MVPA) using miniature activity monitors with 3-D technology worn at various locations under controlled (CON) and free-living conditions (FL). Kenz e-style2, Tanita Calorism Smart, and Omron Calori Scan HJA-306 activity monitors were assessed. Nine and 31 young adult women were assigned to the CON and FL studies, respectively. While walking or jogging on a treadmill at 5 different speeds, the subjects simultaneously carried the 3 different monitors in a pants pocket (PP), a chest shirt pocket, and a shoulder bag (B). Under the FL condition, the 3 monitors were placed only at the PP and B locations for practical reasons. Significant effects of monitor location and walking/jogging speed on the step count measured by the 3 monitors were evaluated under the CON condition. Monitors placed at both PP and B tended to underestimate the number of steps; however, there were no significant differences between the values obtained with the Kenz monitor and those obtained with a criterion accelerometer under the FL condition. Moreover, strong correlations were observed between steps measured by monitors placed at PP and steps measured by the criterion accelerometer. The amount of MVPA for the PP location and the non-carrying duration of the bag for the B location were considered to be important determinants of the accuracy of step counting under the FL condition. In conclusion, monitors placed at the PP location, especially the Kenz monitor, showed acceptable accuracy for young adult women in real-life settings. In contrast, MVPA indices assessed using these monitors showed limited validity.

Accuracy of Wrist and Hip-worn Commercial Physical Activity Monitors In Free Living Conditions

2016 ◽  
Vol 48 ◽  
pp. 781
Author(s):  
Kayla N. Deyarmin ◽  
Kelsey M. Snyder ◽  
Allison G. Mihalik ◽  
Trent A. Hargens
Keyword(s):  
Physical Activity ◽  
Living Conditions ◽  
Free Living ◽  
Activity Monitors ◽  
Physical Activity Monitors ◽  
Free Living Conditions

scholarly journals Fitbit Charge HR Wireless Heart Rate Monitor: Validation Study Conducted Under Free-Living Conditions

2017 ◽  
Vol 5 (10) ◽  
pp. e157 ◽  
Author(s):  
Alexander Wilhelm Gorny ◽  
Seaw Jia Liew ◽  
Chuen Seng Tan ◽  
Falk Müller-Riemenschneider
Keyword(s):  
Heart Rate ◽  
Validation Study ◽  
Living Conditions ◽  
Free Living ◽  
Heart Rate Monitor ◽  
Free Living Conditions

scholarly journals How Well iPhones Measure Steps in Free-Living Conditions: Cross-Sectional Validation Study

10.2196/10418 ◽  
2019 ◽  
Vol 7 (1) ◽  
pp. e10418 ◽  
Author(s):  
Shiho Amagasa ◽  
Masamitsu Kamada ◽  
Hiroyuki Sasai ◽  
Noritoshi Fukushima ◽  
Hiroyuki Kikuchi ◽  
...  
Keyword(s):  
Validation Study ◽  
Living Conditions ◽  
Free Living ◽  
Cross Sectional ◽  
Free Living Conditions

scholarly journals Using Activity Monitors to Measure Physical Activity in Free-Living Conditions

2006 ◽  
Vol 86 (8) ◽  
pp. 1137-1145 ◽  
Author(s):  
Jaime E Berlin ◽  
Kristi L Storti ◽  
Jennifer S Brach
Keyword(s):  
Physical Activity ◽  
Living Conditions ◽  
Free Living ◽  
Activity Monitors ◽  
Free Living Conditions

Validity of Activity Monitor Step Detection Is Related to Movement Patterns

2016 ◽  
Vol 13 (2) ◽  
pp. 145-153 ◽  
Author(s):  
Amanda Hickey ◽  
Dinesh John ◽  
Jeffer E. Sasaki ◽  
Marianna Mavilia ◽  
Patty Freedson
Keyword(s):  
Low Frequency ◽  
Activity Monitor ◽  
Living Environment ◽  
Natural Setting ◽  
Rhythmic Movements ◽  
Free Living ◽  
Activity Monitors ◽  
Different Types ◽  
Step Counting ◽  
Free Living Conditions

Background:There is a need to examine step-counting accuracy of activity monitors during different types of movements. The purpose of this study was to compare activity monitor and manually counted steps during treadmill and simulated free-living activities and to compare the activity monitor steps to the StepWatch (SW) in a natural setting.Methods:Fifteen participants performed laboratory-based treadmill (2.4, 4.8, 7.2 and 9.7 km/h) and simulated free-living activities (eg, cleaning room) while wearing an activPAL, Omron HJ720-ITC, Yamax Digi-Walker SW-200, 2 ActiGraph GT3Xs (1 in “low-frequency extension” [AGLFE] and 1 in “normal-frequency” mode), an ActiGraph 7164, and a SW. Participants also wore monitors for 1-day in their free-living environment. Linear mixed models identified differences between activity monitor steps and the criterion in the laboratory/free-living settings.Results:Most monitors performed poorly during treadmill walking at 2.4 km/h. Cleaning a room had the largest errors of all simulated free-living activities. The accuracy was highest for forward/rhythmic movements for all monitors. In the free-living environment, the AGLFE had the largest discrepancy with the SW.Conclusion:This study highlights the need to verify step-counting accuracy of activity monitors with activities that include different movement types/directions. This is important to understand the origin of errors in step-counting during free-living conditions.

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