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Predicting Risk of Heat-Related Injuries for Individuals Wearing Personal Protective Equipment Using Smartwatches: Feasibility Observational Study

Predicting Risk of Heat-Related Injuries for Individuals Wearing Personal Protective Equipment Using Smartwatches: Feasibility Observational Study

Two data collections with convenience cohorts were conducted to determine the feasibility of using the Garmin Fenix 6 smartwatch for monitoring the health of people wearing PPE. The goals of these efforts were to: Determine if a smartwatch is an appropriate configuration for monitoring individuals wearing PPE, including longer-term wear to determine recovery.

Meghan Hegarty-Craver, Donna Womack, Jonathan Thornburg, Timothy Boe, M John Archer, Worth Calfee

JMIR Form Res 2025;9:e72324


Quantifying Maternal Health Using Digital Phenotyping: Protocol for a Longitudinal Observational Study

Quantifying Maternal Health Using Digital Phenotyping: Protocol for a Longitudinal Observational Study

This protocol collects data passively through a smartphone (Beiwe app [14]) and smartwatch (Labfront application [15]). It collects data prospectively and actively through participant survey completion, EMAs, and participant data logging in the Huckleberry app [16]. The use of the Beiwe app addresses the nonfixed study duration for EMAs and smartphone data by allowing flexibility in study length.

Amanda Glime, Taysir Mahmoud, Soni Rusagara, Alysa St Charles, Devika Lekshmi, Ashley Peterson, Aarti Sathyanarayana

JMIR Res Protoc 2025;14:e77175


Effectiveness of Smartwatch Device on Adherence to Home-Based Cardiac Rehabilitation in Patients With Coronary Heart Disease: Randomized Controlled Trial

Effectiveness of Smartwatch Device on Adherence to Home-Based Cardiac Rehabilitation in Patients With Coronary Heart Disease: Randomized Controlled Trial

The smartwatch-based HBCR program was delivered through a smartphone app. At the time of discharge, participants in the intervention group were provided with a smartwatch pre-installed with the intervention application. Additionally, they were instructed to download the corresponding mobile app onto their personal smartphones via the designated app stores.

Sisi Zhang, Yuehui Wang, Jiahui Wu, Changsheng Ma, Xiaoping Meng

JMIR Mhealth Uhealth 2025;13:e70848


Feasibility, Barriers, and Facilitators of Long-Term Physical Activity Tracking During Treatment: Interview Study Among Childhood Cancer Patients

Feasibility, Barriers, and Facilitators of Long-Term Physical Activity Tracking During Treatment: Interview Study Among Childhood Cancer Patients

Reasons for refusing participation included already owning a smartwatch, unwillingness to wear a smartwatch, disliking the smartwatch’s feeling or appearance, not perceiving the need for a smartwatch to measure physical activity, and considering the smartwatch as an additional burden alongside medical needs. Of the 15 children included in phase 2, 7 (47%) were male, and 12 (80%) were diagnosed with a hematological malignancy (Table 1).

Emma den Hartog, Wim J E Tissing, Sebastian B B Bon, Patrick van der Torre, Emma J Verwaaijen

JMIR Pediatr Parent 2025;8:e75322


Use of Mobile Sensing Data for Longitudinal Monitoring and Prediction of Depression Severity: Systematic Review

Use of Mobile Sensing Data for Longitudinal Monitoring and Prediction of Depression Severity: Systematic Review

Patients can be collectors and owners of large, diverse, long-term datasets through biosensors (wearable devices, including activity trackers), and “biosensor” (short form of biological sensor) data have been defined as physiological measures combined with biological components detected by an analytical device (eg, glucometer, pulse oximeter, and smartwatch) [21].

Rebeka Amin, Simon Schreynemackers, Hannah Oppenheimer, Milica Petrovic, Ulrich Hegerl, Hanna Reich

J Med Internet Res 2025;27:e57418


Determinants of Continuous Smartwatch Use and Data-Sharing Preferences With Physicians, Public Health Authorities, and Private Companies: Cross-Sectional Survey of Smartwatch Users

Determinants of Continuous Smartwatch Use and Data-Sharing Preferences With Physicians, Public Health Authorities, and Private Companies: Cross-Sectional Survey of Smartwatch Users

This study seeks to examine the key factors that determine continuous smartwatch use and users’ comfort levels in sharing their health data collected from a smartwatch with health care practitioners and public health authorities. By identifying these factors, strategies may be developed to enhance user engagement and data sharing, ultimately improving the integration of smartwatch sensor data into health care practices and public health authorities.

Anthony James Goodings, Kayode Philip Fadahunsi, Derjung M Tarn, Jennifer Lutomski, Allison Chhor, Frances Shiely, Patrick Henn, John O'Donoghue

J Med Internet Res 2025;27:e67414


Minimal Clinically Important Difference of Average Daily Steps Measured Through a Consumer Smartwatch in People With Mild-to-Moderate Parkinson Disease: Cross-Sectional Study

Minimal Clinically Important Difference of Average Daily Steps Measured Through a Consumer Smartwatch in People With Mild-to-Moderate Parkinson Disease: Cross-Sectional Study

Participants then received the smartwatch Garmin Vivosmart 4 to be worn at home for 5 consecutive days, including at least 1 weekend day, on the wrist of the body side least affected by the disease [31]. Participants were instructed to wear the smartwatch at all times during the day and night and remove it only when involved in water activities (eg, bathing, showering, and swimming). Participants were also asked to perform daily activities as usual.

Edoardo Bianchini, Marika Alborghetti, Silvia Galli, Clint Hansen, Alessandro Zampogna, Antonio Suppa, Marco Salvetti, Francesco Ernesto Pontieri, Domiziana Rinaldi, Nicolas Vuillerme

JMIR Mhealth Uhealth 2025;13:e64213


Smartphone Usage Patterns and Sleep Behavior in Demographic Groups: Retrospective Observational Study

Smartphone Usage Patterns and Sleep Behavior in Demographic Groups: Retrospective Observational Study

Ciman and Wac [26] found that smartphone screen on and off patterns could estimate sleep duration, sleep onset, wake times, and even sleep deprivation patterns, with only a 7% margin of error compared to smartwatch data. In 2019, a study conducted in the Netherlands reported a strong correlation (R2=0.9) between smartphone touch data and traditional sleep measurement methods, enabling accurate predictions of sleep onset and wake times [28].

Ting Wang, Anja Seiger, Alexander Markowetz, Ionut Andone, Konrad Błaszkiewicz, Thomas Penzel

J Med Internet Res 2025;27:e60423