The global aging population presents increasing challenges for healthcare systems, especially regarding the promotion of autonomy and quality of life. Wearable Health Devices (WHDs) offer promising opportunities to support older adults through remote monitoring and enhanced health management. However, adoption remains limited due to usability barriers, low digital literacy, and youth-centered design. This study investigates the usability and user experience of a consumer-grade wearable device among older adults. A sample of 60 participants aged 65 and above used the device over a two-week period, with data collected through standardized questionnaires (SUS, UEQ, ATI, T-ADLQ) and observational procedures. Results indicate that perceived usability was generally high, but user experience dimensions such as stimulation and novelty were rated lower. Regression analyses showed limited predictive power of demographic and attitudinal variables on task adherence (charging, synchronization, continuous use). A parallel study was performed on 17 subjects of the same age range who did not participate in the study, either because they refused to wear the device or because their smartphone was not compatible with the experiment. Significant differences were found between participants and this group suggesting a selection bias toward more autonomous and tech-savvy individuals. These findings underscore the importance of designing intuitive, accessible, and minimally disruptive technologies for older users. Future research should include more diverse samples and consider qualitative methods to better understand the contextual and motivational factors influencing WHD adoption.