Author Affiliations: Birmingham/Atlanta VA Geriatric Research, Education, and Clinical Center, Atlanta, Georgia (Drs Dubowitz and Johnson) (firstname.lastname@example.org); and Centers for Disease Control and Prevention, Atlanta (Dr Goodman).
To the Editor: The meta-analysis by Mr Umpierre and colleagues1 provided further evidence of the beneficial effects of structured exercise and physical activity advice for glycemic control in those with type 2 diabetes mellitus. However, considering the meta-analysis and the accompanying Editorial by Dr Pahor2 together raises 2 important issues for the interpretation and use of the results.
Dubowitz N, Johnson TM, Goodman RA. Exercise Interventions and Glycemic Control in Patients With Diabetes. JAMA. 2011;306(6):607-610. doi:10.1001/jama.2011.1104