"The More You Give the Wearable, the More It Gives You": How Regular Exercisers Navigate Exercise Using Wearable Devices.

The increased use of consumer off-the-shelf wearables (COTSW) for exercise training and self-monitoring has resulted in some COTSW offering individual 'recovery' or 'readiness' scores. These scores are derived using heart rate variability (HRV) and are designed to be easily interpreted (percent score; color codes) to assist users in optimizing their training. Limited research exists on the perceived informational utility associated with HRV-derived scores, which can impact user adoption and fidelity. The purpose of this qualitative study was to understand individuals' experiences using and interacting with their COTSW and readiness/recovery scores. Seventeen regular exercisers who owned and used a Whoop™ band or Oura™ ring for at least 3 months participated in a one-on-one virtual semi-structured interview. Interviews were analyzed using reflexive thematic analysis, with themes supported by 'in-vivo' quotes. This paper focuses on three key themes for a comprehensive demonstration. Theme 1, 'It's kinda validating, right?' (Detroit) highlights how users found validation and reinforcement in their lifestyle choices and feelings about their well-being. Theme 2, 'It's really putting the power in my hands,' (Misty) indicates users' curiosity and experimentation with their devices, leading to behavioral adjustments aimed at improving their readiness/recovery scores. Theme 3, potential for 'more of an emotional response rather than a rational one, (Brian) demonstrates the complex reactive responses users may have towards these scores and each wearable's interface. These findings contribute to the understanding of how COTSW estimates of readiness or recovery impact users' behavior and self-perception, while highlighting the potential need for user education and design considerations to promote positive interactions with such data.