Which maternal factor is NOT associated with a higher risk of gestational diabetes?

High physical activity is not associated with a higher risk of gestational diabetes because regular exercise and physical activity are known to have protective effects on metabolic health. Engaging in consistent physical activity helps to improve insulin sensitivity and glucose metabolism, ultimately reducing the likelihood of developing gestational diabetes. In contrast, factors like older maternal age, a history of gestational diabetes, and obesity are well-documented risk factors for this condition. Older age can contribute to decreased insulin sensitivity, while a previous occurrence of gestational diabetes increases the risk of recurrence in following pregnancies. Obesity increases the likelihood of insulin resistance, further elevating the risk for gestational diabetes. Therefore, it is clear that high physical activity levels do not contribute to a greater risk but rather support health during pregnancy.