Stian Christophersen is a physiotherapist, climbing coach and best-selling author. He has climbed for over 25 years, has been an athlete on the Norwegian national team and was the 2009 Norwegian bouldering champion. He has worked as a physiotherapist for over 15 years and runs his own practice in Oslo where he specialises in the treatment of upper limb injuries in general and climbing injuries in particular. He has worked specifically with ultrasound diagnostics since 2014. He is a sought-after speaker and lecturer and gives courses to medical professionals on how to diagnose and treat shoulder pain and shoulder injuries. He runs Norway’s biggest podcast in the field of musculoskeletal pain together with his colleague Jørgen Jevne, and he also co-hosts The Climbing Injury Podcast together with physiotherapist James Walker. Stian has climbed extensively outdoors and has first ascents of routes up to F9a and boulder problems up to Font 8b+. He is a former national climbing team coach and has worked with several of Norway’s best climbers over the past 15 years, including Tina Johnsen Hafsaas and Magnus Midtbø. He has also been responsible for the Norwegian Climbing Federation’s education of coaches, and has educated the next generation of coaches at both a national and international level. Alongside Martin Mobråten, he is the co-author of the best-selling training books The Climbing Bible and The Climbing Bible: Practical Exercises. He lives in Oslo with his family.