What are exercise considerations for biguanides?

What are exercise considerations for biguanides?

• A. Very high risk of hypoglycemia during exercise
• B. They are contraindicated during exercise
• C. They cause hyperglycemia during exercise
• D. Very low risk of hypoglycemia, though prolonged exercise may occasionally trigger it

Answer: (D)

Biguanides (such as metformin) lower blood glucose mainly by reducing liver glucose production and improving insulin sensitivity, not by driving more insulin release. Because they don’t stimulate insulin, they don’t typically cause hypoglycemia during exercise. That’s why the general risk of exercise-related low blood sugar is very low. Still, during very prolonged or intense activity, especially if carbohydrate intake is limited, mild hypoglycemia can occasionally occur. So the practical takeaway is that exercise is usually safe with a biguanide, with attention to fueling during long workouts and monitoring for any signs of low blood sugar.

Biguanides (such as metformin) lower blood glucose mainly by reducing liver glucose production and improving insulin sensitivity, not by driving more insulin release. Because they don’t stimulate insulin, they don’t typically cause hypoglycemia during exercise. That’s why the general risk of exercise-related low blood sugar is very low. Still, during very prolonged or intense activity, especially if carbohydrate intake is limited, mild hypoglycemia can occasionally occur. So the practical takeaway is that exercise is usually safe with a biguanide, with attention to fueling during long workouts and monitoring for any signs of low blood sugar.