SUPPLEMENTATION WITH A MULTI-INGREDIENT PRE-WORKOUT SUPPLEMENT DOES NOT ENHANCE BODY COMPOSITION OR METABOLISM IN FEMALES

Hannah ZabriskieƗ1, Clayton L. Camicǂ2, Carl Fosterǂ3, Anna Nelsonǂ3, Brooke Zajacǂ3, Kaela Hoecherlǂ3, Joel Luedkeǂ3, Jacob Ericksonǂ4, Andrew R. Jagimǂ1 1Lindenwood University, St. Charles, MO 2Northern Illinois University, DeKalb, IL 3University of Wisconsin – La Crosse, La Crosse, WI 4Mayo Clinic Health Systems, Onalaska, WI Multiple ingredient pre-workout supplements (MIPS) are purported to induce acute metabolic and physiological changes that may result in favorable body composition improvements, such as lower body fat percentage and increased lean body mass, over time. However, little research has been conducted on the effects and safety of MIPS in female populations. PURPOSE: The purpose of the study was to examine the long-term effects of MIPS ingestion on metabolism, body composition, and clinical health measures in recreationally active females. METHODS: Nineteen recreationally active females completed the randomized, double blind, placebo control study. Resting heart rate and blood pressure, blood lipids, body composition, and resting metabolic rate were recorded before and after a seven-week resistance training program while consuming either a MIPS or placebo daily. RESULTS: No significant group by time interactions were observed for body fat percentage (p=0.66), fat free mass (p=0.87), fat mass (p=0.63), or resting metabolic rate (p=0.52). No differences were detected in clinical health measures such as resting heart rate (p=0.43), systolic blood pressure (p=0.18), diastolic blood pressure (p=0.20), or blood lipid panel measurements (p\u3e0.05). CONCLUSION: This study suggests that consumption of MIPS does not enhance body composition or metabolic rate in recreationally active females. There is no evidence that daily MIPS use over several weeks results in adverse health effects. This study was co-funded through an unrestricted education grant from the International Society of Sports Nutrition and MusclePharm Corporation (Denver, CO)