Effects of Ketogenic Dieting on Body Composition, Strength, Power, and Hormonal Profiles in Resistance Training Men

• Jacob M. Wilson ^[6] ; Ryan P. Lowery ^[1] ; Michael D. Roberts ^[2] ; Matthew H. Sharp ^[6] ; Jordan M. Joy ^[7] ; Kevin A. Shields ^[3] ; Jeremy M. Partl ^[3] ; Jeff S. Volek ^[4] ; Dominic P. D'Agostino ^[5]
  1. [1] Concordia University Chicago

     Concordia University Chicago

     Township of River Forest, Estados Unidos

     
  2. [2] Auburn University

     Auburn University

     Estados Unidos

     
  3. [3] University of Tampa

     University of Tampa

     Estados Unidos

     
  4. [4] Ohio State University

     Ohio State University

     City of Columbus, Estados Unidos

     
  5. [5] University of South Florida

     University of South Florida

     Estados Unidos

     
  6. [6] Applied Science & Performance Institute, Tampa, Florida
  7. [7] Department of Nutrition and Food Science, Texas Woman's University, Denton, Texas

  Mostrar afiliaciones +
• Localización: Journal of strength and conditioning research: the research journal of the NSCA, ISSN 1064-8011, Vol. 34, Nº. 12, 2020, págs. 3463-3474
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Dialnet Métricas: 1 Cita
• Resumen

  • 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[middle dot]dl-1) as compared to the WD (-36 ng[middle dot]dl-1) 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.