Comparison of four Fitbit and Jawbone activity monitors with a research-grade ActiGraph accelerometer for estimating physical activity and energy expenditure

Imboden, Mary T.; Nelson, M. Benjamin; Kaminsky, Leonard A.; Montoye, Alexander H.K.

doi:10.1136/bjsports-2016-096990

Cited by 105 publications

(89 citation statements)

References 24 publications

(10 reference statements)

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“…Hereby, the very low activity levels found in this cohort was consistent with earlier findings [10,18,[29][30][31], although the absolute values were higher in this study caused by the recently adapted threshold [20]. e need for these adjusted algorithms and appropriate tracker devices is in accordance with studies, showing distinctive validity for different wearables and intensities [32,33]. e clinical improvement observed between operation and discharge could be documented with a similar quality as the usually applied indices for quality of life (EQ5D) and functional independence (Barthel-20), which are regarded as the current gold standard [34].…”

Section: Discussionsupporting

confidence: 92%

Objectively Measured Physical Activity and Its Association with Functional Independence, Quality of Life and In-Hospital Course of Recovery in Elderly Patients with Proximal Femur Fractures: A Prospective Cohort Study

Marsault

Ryg

Madsen

et al. 2020

Rehabilitation Research and Practice

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Background. Physical activity in elderly patients is crucial for recovery from proximal femoral fractures. Considering the limited possibilities for objective measurement, we aimed to evaluate the use of an accelerometer in this population to determine activity’s association with functional independence, quality of life, and course of recovery. Methods. 52 patients undergoing operative treatment for proximal femur fractures (81.3 ± 7.5 years) were included in a prospective cohort study. 12 patients with fall but without fracture of the lower extremities (80.8 ± 9.5 years) served as control. An Axivity AX3 tracker continuously recorded signal vector magnitudes during the hospital stay. Additionally, 2 ± 1 and 8 ± 3 days (time point 1 and 2) after operation EuroQol-5D and Barthel-20 indices were evaluated. Results. Physical activity increased in all patients with time. Multiple regression analyses revealed that a high Barthel-20 before fracture, a low age, a high body mass index, high albumin, and low C-reactive protein levels were independent predictors for high physical activity at time point 1 (p<0.05). Physical activity correlated significantly with EuroQol-5D and Barthel-20 at time point 1 and 2 (p<0.02). Furthermore, physical activity at time point 1 predicted EuroQol-5D, physical activity, and Barthel-20 at time point 2 (p<0.01). A multiple regression demonstrated equal physical activity in patients with or without a hip fracture. Conclusions. Accelerometer signals correlate with postoperative physical activity, Barthel-20 and quality of life in elderly patients. Physical activity is thereby positively influenced by a high prefall functional independence and a good nutrition status. A timely and adequate operation provided, there is no difference between patients with or without a fracture. This trial is registered with DRKS 00011934 on 10th April 2017.

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Section: Discussionsupporting

confidence: 92%

Objectively Measured Physical Activity and Its Association with Functional Independence, Quality of Life and In-Hospital Course of Recovery in Elderly Patients with Proximal Femur Fractures: A Prospective Cohort Study

Marsault

Ryg

Madsen

et al. 2020

Rehabilitation Research and Practice

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“…One potential confounder includes the wrist versus waist location of the monitoring devices during data collection, although this arrangement is consistent with that of similar studies that compared data from these devices (2)(3)(4)10,(13)(14)(15)(16). The study could not control for wear time of the consumer devices, and this might have impacted results.…”

Section: Discussionmentioning

confidence: 63%

Comparison of Physical Activity Measures Derived From the Fitbit Flex and the ActiGraph GT3X+ in an Employee Population With Chronic Knee Symptoms

Semanik

Lee

Pellegrini

et al. 2019

ACR Open Rheumatology

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Objective. We examined the accuracy of data from an affordable personal monitor (Fitbit Flex) compared with that of data from a research-grade accelerometer worn simultaneously for 7 days; high accuracy would support substitution with this less-expensive personal activity monitor in future community-based arthritis research.Methods. Subjects (N = 35) with chronic knee symptoms were recruited for a pilot intervention study using Fitbits to increase physical activity in employees with chronic knee symptoms at an urban corporation. Subjects simultaneously wore for 7 days a Fitbit Flex (wrist-worn) and ActiGraph GT3X+ (waist-worn). Fitbit Flex data were regularly stored on a research storage service (Fitabase) by participants. Bland-Altman plots were constructed to examine the agreement between the mean daily times spent in light activity and in bouted moderate-to-vigorous physical activity (MVPA). Comparisons were calculated by matching Fitabase data from calendar days the Fitbit was worn with data from valid monitoring days (greater than or equal to 10 hours wear time) of the ActiGraph.Results. Participants at baseline were mostly female (69%) and white (57%) and had a mean age of 52 years and body mass index of 32 kg/m 2 . Bland-Altman analyses indicated systematic bias overall (the Fitbit overestimated both light-intensity activity and MVPA compared with the ActiGraph). The average error varied in magnitude and direction with changing activity amounts.Conclusion. The Fitbit Flex does not appear to be an adequate substitute for research-grade accelerometry (which represents the gold standard for objective research monitoring of all physical activity intensity levels) in this population of persons with chronic knee symptoms.

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“…In acute studies, subject also wore a custom-designed primate jacket (Lomir, Quebec, Canada) that protected the port and housed a commercially available 3-way accelerometer (FitBit Zip, FitBit, San Francisco, CA). The accelerometer has been shown to produce reliable activity data in human studies and was used here to measure daily activity counts (Imboden et al, 2017). During daily experimental sessions, the subject sat in a standard primate chair (Primate Products, Immokalee, FL or PLAS Lab Model 515-SASR, Lansing.…”

Section: Methodsmentioning

confidence: 99%

Effects of lorcaserin (Belviq®) on nicotine- and food-maintained responding in non-human primates

Jacobs

Barkin

Kohut³

et al. 2017

Drug and Alcohol Dependence

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Background Accumulating evidence suggests that the FDA-approved serotonin 5HT2C receptor agonist, lorcaserin (Belviq®), may be a promising candidate for the management of substance use disorders, including nicotine addiction. The present study was conducted to determine the efficacy and selectivity of acute or continuous lorcaserin treatment for decreasing the reinforcing effects of nicotine in a primate species. Methods Adult rhesus monkeys (n=4) with a history of nicotine self-administration (>2 years) responded for injections of nicotine (0.32–100 µg/kg IV) or food pellets under a fixed-ratio schedule of reinforcement during daily 100-min sessions. When responding was stable, lorcaserin was administered either as an acute pretreatment (0.1–1.0 mg/kg, IM) or by continuous infusion (0.1 mg/kg/hr, SC for 3–5 days). Daily activity patterns were also monitored immediately following experimental sessions. Results Results indicate that acute lorcaserin pretreatment produced significant and dose-dependent decreases in nicotine-maintained responding across a >100-fold range of self-administered nicotine doses. Continuous lorcaserin treatment decreased intake of 10 µg/kg/inj nicotine to about 50% of baseline values. Food-maintained responding was only moderately decreased in 3 of 4 subjects after acute administration and unaffected in all subjects during continuous treatment. Daily activity also was significantly decreased—to ≤50% of control values—following experimental sessions in which acute lorcaserin was administered. Conclusions These data indicate that lorcaserin reduces IV self-administration of nicotine at a dose that decreases motoric activity but less consistently disrupts food-maintained responding. Further research into lorcaserin’s potential utility for the management of nicotine dependence is warranted.

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Comparison of four Fitbit and Jawbone activity monitors with a research-grade ActiGraph accelerometer for estimating physical activity and energy expenditure

Cited by 105 publications

References 24 publications

Objectively Measured Physical Activity and Its Association with Functional Independence, Quality of Life and In-Hospital Course of Recovery in Elderly Patients with Proximal Femur Fractures: A Prospective Cohort Study

Objectively Measured Physical Activity and Its Association with Functional Independence, Quality of Life and In-Hospital Course of Recovery in Elderly Patients with Proximal Femur Fractures: A Prospective Cohort Study

Comparison of Physical Activity Measures Derived From the Fitbit Flex and the ActiGraph GT3X+ in an Employee Population With Chronic Knee Symptoms

Effects of lorcaserin (Belviq®) on nicotine- and food-maintained responding in non-human primates

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