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Skip search results from other journals and go to results- 12 JMIR mHealth and uHealth
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Table 2 shows the comparison of the general parametric sleep parameters of actigraphy between the MI group and the healthy control group after controlling for age, gender, and BMI. In the MI group, the average duration of actigraphy monitoring was 5.75 (SD 2.01) days.
J Med Internet Res 2025;27:e63897
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Validation of Sleep Measurements of an Actigraphy Watch: Instrument Validation Study
Watch-based actigraphy can efficiently collect multiple nights’ data in a natural environment [12,13].
We assessed i Aide2-measured sleep duration and total sleep time (TST) in participants without sleep disorders and added calibration when needed.
To assess free-living sleep, we validated i Aide2 against a second actigraph, the Motion Watch 8 (MW8; Cam Ntech Ltd) [14], using methods similar to other actigraph-to-actigraph comparisons [11,15-17].
JMIR Form Res 2025;9:e63529
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Recent studies have focused on the role of actigraphy or the measure of relative activity, namely in sleep and wake cycles, as a means of capturing more natural sleep and wake habits [1,2,5,10-21]. This is typically accomplished utilizing accelerometer (ACC)-based data from small, portable (wristwatch-sized) recording devices.
JMIR Ment Health 2024;11:e62959
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Only participants who had complete actigraphy data were included in analyses (n=84). For stage 1, unlimited LPA was permitted, MVPA was limited to ≤2.5% of wear time and no consecutive bouts of ≥5 minutes at any intensity were recommended. In stage 2, baseline activity observed in stage 1 was permitted, as well as an extra 30 minutes of LPA, but no consecutive bouts ≥5 minutes of MVPA were recommended.
JMIR Pediatr Parent 2024;7:e57325
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Actigraphy has been validated against gold standard lab-based measures of sleep (ie, polysomnography [22]) and physical activity (ie, indirect calorimetry [23]). Smartphone-based EMA and wrist actigraphy have been successfully used with youth [24-26] and can be feasibly used to examine person-specific drivers with depressed adolescents.
Smartphone-based mobile sensing may offer advantages over established methods—especially for adolescents—but needs validation.
JMIR Res Protoc 2024;13:e43931
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Results showed no significant difference between app-measured and actigraphy-measured sleep onset and wake time, as well as the midpoint of sleep. However, the app-measured WASO was found to be longer (13.5, SD 19.5 minutes) than the actigraphy-measured WASO, resulting in a longer actigraphy-measured TST of 20.2 (SD 66.7) minutes compared to the app-measured TST. The obesity group had a significantly longer TST than the overweight and control groups, regardless of the measurement method.
J Med Internet Res 2024;26:e50149
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In this study, we used data from more than 94,000 participants aged 43-79 years in a large prospective cohort study, the UK Biobank (UKB), with at least 6 continuous days of wrist actigraphy recording and up to 7.5 years of follow-up to examine the association of RAR measures with future risk of dementia or mild cognitive impairment (MCI). We also explored the potential effects of age, genetics, and shiftwork on this association.
JMIR Public Health Surveill 2024;10:e55211
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Reference 38: Nonparametric methods in actigraphy: An update Reference 45: Actigraphy-measured rest-activity circadian rhythm disruption in patients with advancedactigraphy
JMIR Res Protoc 2024;13:e52957
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Sleep duration can now be passively tracked through continuous actigraphy sensing over months and even years, while perceived stress levels can be probed via brief daily smartphone-based surveys, with high compliance rates in student samples and small participant burden [23-25].
JMIR Form Res 2024;8:e53441
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Reference 10: A novel machine learning unsupervised algorithm for sleep/wake identification using actigraphyactigraphy
JMIR Aging 2024;7:e54353
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