(A) The online sports-health surveillance system workflow (adapted from Clarsen et al8). The workflow was completed every 2 weeks for judo and weekly for swimming and volleyball teams. (A) The online sports-health surveillance system workflow (adapted from Clarsen et al8). The workflow was completed every 2 weeks for judo and weekly for swimming and volleyball teams. (B) The interview coding framework to investigate end-users’ perceptions towards the system. Saulo Delfino Barboza et al. BMJ Open Sport Exerc Med 2017;3:e000275 ©2017 by BMJ Publishing Group Ltd