You agree to indemnify and hold Strava and its subsidiaries, affiliates, officers, agents, representatives, employees, partners and licensors harmless from any claim or demand, including reasonable attorneys' fees, made by any third party due to or arising out of Content you submit, post, transmit or otherwise seek to make available through the Site, your use of the Site, your athletic activities which generate the Content you post or seek to post on the Site (including, but not limited to, athletic activities in connection with any contests, races, group rides, or other events which Strava sponsors, organizes, participates in, or whose Site is used in connection with), your connection to the Site, your violation of the Terms, or your violation of any rights of another person or entity.
Hmm, they've updated their T&Cs to include this: