I almost feel like we ' re arguing a chicken and egg situation here . We agree on the issues trying something beyond your physical limits and hitting yourself but we disagree on how to avoid it . So , that said , I ' d say that hangboarding note , NOT campusing is more controlled than climbing a route at your limit . You have full control over the effective stress on your tendons , in a way you could never achieve while climbing . I think unsafe hangboarding not listening to your body , moving too quickly , not resting enough , etc . Is an issue regardless of whether you climb 10 c or 12 c . So I think that if you approach hangboarding responsibly , it ' s far safer than just climbing for those of us who aren ' t like Dave Graham or Chris Sharma and gifted with tremendous tendon strength .