RETRACTION: J. Qi, X. Luo, Z. Ma, et al. “Swimming Exercise Protects against Insulin Resistance via Regulating Oxidative Stress through Nox4 and AKT Signaling in High‐Fat Diet‐Fed Mice,” Journal of Diabetes Research, 2020, 2521590, https://doi.org/10.1155/2020/2521590. The gene discussed is NOX4; the disease is Insulin resistance.