However, injection of 1D11 antibody from week 8 post‐DI, when active TGF‐β1 was restored to base line (Figure 2L), did not significantly attenuate tendinopathy measured by mechanical properties, suggesting 1D11 only works when active TGF‐β1 is present in Achilles tendons (Figure S4B, Supporting Information). This evidence concerns the gene TGFB1 and disease of the tendon.