Co-designing wearable devices for sports: The case study of sport climbing.

•Offers a user-driven perspective on the design of wearable devices for sports.•Elicits climbers’ values influencing wearables acceptance and the related design considerations.•Presents design activities that involve potential users in the real context of use.•Explores the possibility to augment interpersonal communication in sport through vibrotactile feedback.•Compares different design solutions in the real context of use.