title: Effects of Ketogenic Dieting on Body Composition, Strength, Power, and Hormonal Profiles in Resistance Training Men.
abstract: Wilson, JM, Lowery, RP, Roberts, MD, Sharp, MH, Joy, JM, Shields, KA, Partl, JM, Volek, JS, and D'Agostino, DP. Effects of ketogenic dieting on body composition, strength, power, and hormonal profiles in resistance training men. J Strength Cond Res 34(12): 3463-3474, 2020-This study investigated the impact of an isocaloric and isonitrogenous ketogenic diet (KD) versus a traditional western diet (WD) on changes in body composition, performance, blood lipids, and hormonal profiles in resistance-trained athletes. Twenty-five college-aged men were divided into a KD or traditional WD from weeks 1 to 10, with a reintroduction of carbohydrates from weeks 10 to 11, while participating in a resistance training program. Body composition, strength, power, and blood lipid profiles were determined at weeks 0, 10, and 11. A comprehensive metabolic panel and testosterone levels were also measured at weeks 0 and 11. Lean body mass (LBM) increased in both the KD and WD groups (2.4% and 4.4%, p < 0.01) at week 10. However, only the KD group showed an increase in LBM between weeks 10 and 11 (4.8%, p < 0.0001). Finally, fat mass decreased in both the KD (-2.2 ± 1.2 kg) and WD groups (-1.5 ± 1.6 kg). Strength and power increased to the same extent in the WD and KD conditions from weeks 1 to 11. No changes in any serum lipid measures occurred from weeks 1 to 10; however, a rapid reintroduction of carbohydrate from weeks 10 to 11 raised plasma triglyceride levels in the KD group. Total testosterone increased significantly from weeks 0 to 11 in the KD diet (118 ng·dl) as compared to the WD (-36 ng·dl) from pre to post while insulin did not change. The KD can be used in combination with resistance training to cause favorable changes in body composition, performance, and hormonal profiles in resistance-trained men.
authors.affiliation: Applied Science & Performance Institute, Tampa, Florida.
authors.forename: Jacob M
authors.initials: JM
authors.lastname: Wilson
authors.affiliation: Applied Science & Performance Institute, Tampa, Florida.|Department of Health and Human Performance, Concordia University Chicago, River Forest, Illinois.
authors.forename: Ryan P
authors.initials: RP
authors.lastname: Lowery
authors.affiliation: Molecular and Applied Sciences Laboratory, School of Kinesiology, Auburn University, Auburn, Alabama.
authors.forename: Michael D
authors.initials: MD
authors.lastname: Roberts
authors.affiliation: Applied Science & Performance Institute, Tampa, Florida.
authors.forename: Matthew H
authors.initials: MH
authors.lastname: Sharp
authors.affiliation: Department of Nutrition and Food Science, Texas Woman's University, Denton, Texas.
authors.forename: Jordan M
authors.initials: JM
authors.lastname: Joy
authors.affiliation: Department of Health Sciences and Human Performance, The University of Tampa, Tampa, Florida.
authors.forename: Kevin A
authors.initials: KA
authors.lastname: Shields
authors.affiliation: Department of Health Sciences and Human Performance, The University of Tampa, Tampa, Florida.
authors.forename: Jeremy M
authors.initials: JM
authors.lastname: Partl
authors.affiliation: Department of Human Sciences, Kinesiology Program, Ohio State University, Columbus, Ohio; and.
authors.forename: Jeff S
authors.initials: JS
authors.lastname: Volek
authors.affiliation: Department of Molecular Pharmacology and Physiology, Morsani College of Medicine, University of South Florida, Tampa, Florida.
authors.forename: Dominic P
authors.initials: DP
authors.lastname: D'Agostino
mesh_terms: D000328:Adult; D056352:Athletes; D001823:Body Composition / Q000502:physiology*; D055423:Diet, Ketogenic / Q000379:methods*; D066273:Diet, Western; D006801:Humans; D008055:Lipids / Q000097:blood; D008297:Male; D053580:Muscle Strength / Q000502:physiology*; D018482:Muscle, Skeletal / Q000502:physiology*; D055070:Resistance Training / Q000379:methods*; D013739:Testosterone / Q000097:blood*; D055815:Young Adult
chemical_list: D008055:Lipids; D013739:Testosterone