Myths vs facts: Insulin and Sport

Myths vs facts: Insulin and Sport. A common myth is that insulin is only relevant for diabetics. In fact, insulin sensitivity affects athletic performance and recovery. Another myth: exercise always lowers insulin needs. Evidence shows that endurance and resistance training can improve insulin sensitivity, but effects vary by intensity and duration (PMC13142718). A third myth: gut microbiome tests can optimize insulin response. The evidence is mechanistic, not actionable. Fact: combining exercise with pharmacotherapy improves metabolic health more than either alone (human-strong, PMC13142718). However, overtraining can impair insulin sensitivity. Overall, evidence for personalized insulin strategies in sport remains limited. The link between insulin resistance and certain cancers (e.g., bladder cancer) is discussed but not causally proven (PMC13164377).