A groundbreaking study published in The Journal of Clinical Endocrinology & Metabolism suggests that combining metformin, the most widely prescribed diabetes medication, with exercise may blunt some of its benefits. Researchers from Rutgers University discovered that adults who took metformin while exercising showed smaller improvements in blood sugar control and aerobic fitness compared to those who exercised without the drug.
The study involved 72 participants at risk for metabolic syndrome and was conducted over a period of 16 weeks. Half of the participants performed high- or low-intensity exercise with either metformin (2,000 milligrams daily) or a placebo, while the other half did not take metformin. The results showed that exercising without metformin led to greater improvements in vascular insulin sensitivity, which enables blood vessels to better respond to insulin and deliver nutrients to muscles.
However, adding metformin to their routine resulted in smaller gains in this area. Additionally, participants who took metformin while exercising experienced less reduction in inflammation and fasting glucose levels. Researchers believe that metformin may interfere with the body's ability to adapt to exercise on a cellular level, possibly affecting blood vessel health.
The study's findings are not surprising, as they align with previous research suggesting that combining certain medications with exercise can reduce its benefits. The researchers stress that people should not stop taking metformin or exercising but rather discuss their treatment options with their doctors to ensure they're getting the best combination of care and activity.
While the results may seem discouraging, experts emphasize that metformin remains an effective first-line medication for treating Type 2 diabetes. For those using metformin for reasons other than blood sugar control, such as anti-aging or cancer prevention, the study's findings may be more relevant.
The researchers plan to conduct further studies to explore how to preserve the benefits of both treatments and are now testing whether adjusting dosage or timing could reduce the effect of metformin on exercise.
The study involved 72 participants at risk for metabolic syndrome and was conducted over a period of 16 weeks. Half of the participants performed high- or low-intensity exercise with either metformin (2,000 milligrams daily) or a placebo, while the other half did not take metformin. The results showed that exercising without metformin led to greater improvements in vascular insulin sensitivity, which enables blood vessels to better respond to insulin and deliver nutrients to muscles.
However, adding metformin to their routine resulted in smaller gains in this area. Additionally, participants who took metformin while exercising experienced less reduction in inflammation and fasting glucose levels. Researchers believe that metformin may interfere with the body's ability to adapt to exercise on a cellular level, possibly affecting blood vessel health.
The study's findings are not surprising, as they align with previous research suggesting that combining certain medications with exercise can reduce its benefits. The researchers stress that people should not stop taking metformin or exercising but rather discuss their treatment options with their doctors to ensure they're getting the best combination of care and activity.
While the results may seem discouraging, experts emphasize that metformin remains an effective first-line medication for treating Type 2 diabetes. For those using metformin for reasons other than blood sugar control, such as anti-aging or cancer prevention, the study's findings may be more relevant.
The researchers plan to conduct further studies to explore how to preserve the benefits of both treatments and are now testing whether adjusting dosage or timing could reduce the effect of metformin on exercise.