The Science of Building Muscle 7 – REF 7

7. Warren, Gordon & Park, Nicole & Maresca, Robert & McKibans, Kimberly & Millard-Stafford, Mindy. (2009). Effect of Caffeine Ingestion on Muscular Strength and Endurance: A Meta-Analysis. Medicine and science in sports and exercise. 42. 1375-87. 10.1249/MSS.0b013e3181cabbd8.