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Wrist-Worn and Arm-Worn Wearables for Monitoring Heart Rate During Sedentary and Light-to-Vigorous Physical Activities: Device Validation Study

Wrist-Worn and Arm-Worn Wearables for Monitoring Heart Rate During Sedentary and Light-to-Vigorous Physical Activities: Device Validation Study

However, the continuous use of chest straps every day in the field can lead to discomfort, incompatibility with equipment, or displacement issues [12]. Consequently, there is growing interest in wrist-, upper arm-, or forearm-wearable devices, which use photoplethysmography (PPG) [13]. PPG is a noninvasive measurement technique that detects blood volume changes in the microvascular bed of tissue by illuminating the skin and measuring the reflected light [14].

Theresa Schweizer, Rahel Gilgen-Ammann

JMIR Cardio 2025;9:e67110

Targeted Behavior Change Communication Using a Mobile Health Platform to Increase Uptake of Long-Lasting Insecticidal Nets Among Pregnant Women in Tanzania: Hati Salama “Secure Voucher” Study Cluster Randomized Controlled Trial

Targeted Behavior Change Communication Using a Mobile Health Platform to Increase Uptake of Long-Lasting Insecticidal Nets Among Pregnant Women in Tanzania: Hati Salama “Secure Voucher” Study Cluster Randomized Controlled Trial

Participants attending one of the 50 clinics allocated to the intervention group received targeted BCC messages on their registered mobile phones at programmed intervals during the 14-day period in which the e-voucher was active. Messages contained health promotion and sensitization information on the importance of malaria prevention and LLIN use during pregnancy, in addition to reminders to redeem the e-voucher for an LLIN at a registered retailer (Textbox 1).

Trinity Vey, Eleonora Kinnicutt, Andrew G Day, Nicola West, Jessica Sleeth, Kenneth Bernard Nchimbi, Karen Yeates

J Med Internet Res 2025;27:e51524

Automated Digital Safety Planning Interventions for Young Adults: Qualitative Study Using Online Co-design Methods

Automated Digital Safety Planning Interventions for Young Adults: Qualitative Study Using Online Co-design Methods

.”), most of the specific concerns about discretion and privacy focused on people in one’s day-to-day environment gaining access to information and how that disclosure would negatively affect an individual’s relationships. As G1-P6 explains, “most texting apps on phones don’t have locks or passwords as far as I know, and if someone got a hold of the person’s phone they would have immediate access to intimate and private details about the texter’s mental health.”

Jonah Meyerhoff, Sarah A Popowski, Tanvi Lakhtakia, Emily Tack, Rachel Kornfield, Kaylee P Kruzan, Charles J Krause, Theresa Nguyen, Kevin Rushton, Anthony R Pisani, Madhu Reddy, Kimberly A Van Orden, David C Mohr

JMIR Form Res 2025;9:e69602

Adapting the Germ Defence Web-Based Intervention to Improve Infection Prevention and Control in Care Homes: Interview Study Among Care Home Staff

Adapting the Germ Defence Web-Based Intervention to Improve Infection Prevention and Control in Care Homes: Interview Study Among Care Home Staff

In England and Wales, there are approximately 278,000 care home residents aged ≥65 years (approximately three-quarters of whom are aged ≥80 years), approximately half of whom live in homes with nursing and half of whom live in homes without nursing and over two-thirds of whom experience substantial limitations in their ability to carry out day-to-day activities [3].

Alex Hall, Johanna Aguilera-Muñoz, Lisa McGarrigle, Charlotte Eost-Telling, James Denison-Day, Christie Cabral, Merlin Willcox, Chris Todd

JMIR Form Res 2025;9:e66706

The Social Construction of Categorical Data: Mixed Methods Approach to Assessing Data Features in Publicly Available Datasets

The Social Construction of Categorical Data: Mixed Methods Approach to Assessing Data Features in Publicly Available Datasets

Computer scientists who build machine learning and other statistical models “work every day on the design delegation, and choice of classification systems and standards” [24]. Thus, they have immense decision-making power over the specifications of the classification systems implemented. However, as Bowker and Star [24] note, “few see them as artifacts embodying moral and aesthetic choices that in turn craft people’s identities, aspirations, and dignity.”

Theresa Willem, Alessandro Wollek, Theodor Cheslerean-Boghiu, Martha Kenney, Alena Buyx

JMIR Med Inform 2025;13:e59452

Social Media Recruitment as a Potential Trigger for Vulnerability: Multistakeholder Interview Study

Social Media Recruitment as a Potential Trigger for Vulnerability: Multistakeholder Interview Study

Depending on the social media platform, this could be laborious, as this expert acknowledged: But Facebook changes its rules every second day, and you have to have someone whose job it is to monitor those.… It’s really, really hard from a privacy and confidentiality point of view because you’re not in control of what Facebook does. One ethicist from the United States emphasized the importance of raising awareness about the potential misuse of data on social media.

Nina Matthes, Theresa Willem, Alena Buyx, Bettina M Zimmermann

JMIR Hum Factors 2024;11:e52448