Could Exercise Before Islet Transplant Improve Outcomes? New Rat Study Suggests Yes

Researchers compared two groups of diabetic rats: one that exercised for four weeks before islet transplantation, and one that remained sedentary. The exercising group performed voluntary wheel running three days per week, one hour per session, while fasting.

Four weeks after transplant, all seven exercising rats achieved normal blood sugar levels. In contrast, only four of six sedentary rats reached this milestone. The exercising group also showed better nonfasting blood glucose readings and weight gain after surgery.

The researchers observed that exercise produced measurable biological changes before transplant. Exercising animals showed signs of lower inflammation in fat tissue and greater insulin sensitivity—the body's ability to use insulin effectively—compared to sedentary animals.

Exercise is known to improve insulin sensitivity, reduce chronic inflammation, and help muscles take up glucose without insulin. These effects may prime the body to work better with a transplanted islet graft.

Islet transplantation is a treatment for select people with Type 1 diabetes that can reduce or eliminate insulin injections and prevent severe low blood sugar episodes. However, achieving insulin independence is not guaranteed, and this research offers a potential strategy to improve those odds.

It's important to note that this study was conducted in rats. Animal research often doesn't translate directly to humans, and many additional studies would be needed before doctors could recommend pretransplant exercise as standard preparation. Anyone considering islet transplant should discuss any exercise program with their transplant team.

If these findings hold in human studies, pretransplant exercise would be a simple, low-cost intervention that might help more transplant recipients achieve better outcomes. For people preparing for islet transplantation, this research suggests that physical activity in the weeks before surgery may be worth prioritizing—though always under medical guidance.

Source: American journal of physiology. Endocrinology and metabolism. Evidence type: PubMed indexed literature. Type1Cure is an information and intelligence hub, not a medical advice service. This article summarizes published research and does not provide diagnosis, treatment, or personal medical guidance. Always talk to your own care team before changing anything about your Type 1 diabetes management.