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Beta-Hydroxy-Beta-Methylbutyrate (HMB)" (2013)

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Beta-Hydroxy-Beta-Methylbutyrate (HMB) University of Central Florida STARS Faculty Bibliography 2010s Faculty Bibliography 1-1-2013 International Society of Sports Nutrition Position Stand: beta- hydroxy-beta-methylbutyrate (HMB) Jacob M. Wilson Peter J. Fitschen Bill Campbell Gabriel J. Wilson Nelo Zanchi See next page for additional authors Find similar works at: https://stars.library.ucf.edu/facultybib2010 University of Central Florida Libraries http://library.ucf.edu This Review is brought to you for free and open access by the Faculty Bibliography at STARS. It has been accepted for inclusion in Faculty Bibliography 2010s by an authorized administrator of STARS. For more information, please contact [email protected]. Recommended Citation Wilson, Jacob M.; Fitschen, Peter J.; Campbell, Bill; Wilson, Gabriel J.; Zanchi, Nelo; Taylor, Lem; Wilborn, Colin; Kalman, Douglas S.; Stout, Jeffrey R.; Hoffman, Jay R.; Ziegenfuss, Tim N.; Lopez, Hector L.; Kreider, Richard B.; Smith-Ryan, Abbie E.; and Antonio, Jose, "International Society of Sports Nutrition Position Stand: beta-hydroxy-beta-methylbutyrate (HMB)" (2013). Faculty Bibliography 2010s. 4855. https://stars.library.ucf.edu/facultybib2010/4855 Authors Jacob M. Wilson, Peter J. Fitschen, Bill Campbell, Gabriel J. Wilson, Nelo Zanchi, Lem Taylor, Colin Wilborn, Douglas S. Kalman, Jeffrey R. Stout, Jay R. Hoffman, Tim N. Ziegenfuss, Hector L. Lopez, Richard B. Kreider, Abbie E. Smith-Ryan, and Jose Antonio This review is available at STARS: https://stars.library.ucf.edu/facultybib2010/4855 Wilson et al. Journal of the International Society of Sports Nutrition 2013, 10:6 http://www.jissn.com/content/10/1/6 REVIEW Open Access International Society of Sports Nutrition Position Stand: beta-hydroxy-beta-methylbutyrate (HMB) Jacob M Wilson1*, Peter J Fitschen2, Bill Campbell3†, Gabriel J Wilson4, Nelo Zanchi5†, Lem Taylor6†, Colin Wilborn6†, Douglas S Kalman7, Jeffrey R Stout8, Jay R Hoffman8, Tim N Ziegenfuss9, Hector L Lopez9,10, Richard B Kreider11, Abbie E Smith-Ryan12 and Jose Antonio13† Abstract Position Statement: The International Society of Sports Nutrition (ISSN) bases the following position stand on a critical analysis of the literature on the use of beta-hydroxy-beta-methylbutyrate (HMB) as a nutritional supplement. The ISSN has concluded the following. 1. HMB can be used to enhance recovery by attenuating exercise induced skeletal muscle damage in trained and untrained populations. 2. If consuming HMB, an athlete will benefit from consuming the supplement in close proximity to their workout. 3. HMB appears to be most effective when consumed for 2 weeks prior to an exercise bout. 4. Thirty-eight mg·kg·BM-1 daily of HMB has been demonstrated to enhance skeletal muscle hypertrophy, strength, and power in untrained and trained populations when the appropriate exercise prescription is utilized. 5. Currently, two forms of HMB have been used: Calcium HMB (HMB-Ca) and a free acid form of HMB (HMB-FA). HMB-FA may increase plasma absorption and retention of HMB to a greater extent than HMB-CA. However, research with HMB-FA is in its infancy, and there is not enough research to support whether one form is superior. 6. HMB has been demonstrated to increase LBM and functionality in elderly, sedentary populations. 7. HMB ingestion in conjunction with a structured exercise program may result in greater declines in fat mass (FM). 8. HMB’s mechanisms of action include an inhibition and increase of proteolysis and protein synthesis, respectively. 9. Chronic consumption of HMB is safe in both young and old populations. Introduction it is probable that these effects are partly mediated by the Supplementing the diet with the amino acid leucine in conversion of leucine to a specific metabolite [7]. One combination with resistance training may increase lean strong candidate is the leucine-derived metabolite, beta- body mass (LBM), strength and decrease body fat [1-3]. hydroxy-beta-methylbutyrate (HMB) [7,8]. In 1996, Nissen Moreover, leucine appears to decrease skeletal muscle et al. [7] first demonstrated that supplementation with soreness following eccentric exercise [4], and prevent HMB lowered muscle proteolysis following resistance declines in both circulating testosterone and skeletal training, and augmented gains in LBM and strength in a muscle power following an overreaching cycle [5]. Leucine dose-dependent manner. Since that time HMB has been has been thought to augment adaptations to strength studied in a variety of anaerobic and aerobic training con- training by acting as the primary signal to activate protein ditions ([9]). While numerous studies have supported the synthesis (e.g. regulation of translation initiation) [1]. Add- efficacy of HMB supplementation for enhancing recovery itionally, for over three decades this amino acid has been [10,11], LBM [10,12], strength [7], power [13], and aerobic known to exert antiproteolytic effects [6]. However, the performance [14], there have been conflicting results effects of leucine on muscle proteolysis are maximized at (Tables 1 and 2). For this reason, the primary purpose of − 10–20 times (5–10 mM•L 1) the concentration required this Position Stand is to critically analyze the existing lit- to maximally stimulate muscle protein synthesis [6]. Thus, erature on HMB supplementation and provide careful recommendations on how to optimize its effects on body * Correspondence: [email protected] composition, strength, power, and aerobic performance †Equal contributors 1Department of Health Sciences and Human Performance, University of across varying levels of age, sex, and training status. The Tampa, Tampa, FL, USA second purpose of this Position Stand is to critically Full list of author information is available at the end of the article © 2013 Wilson et al.; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. http://www.jissn.com/content/10/1/6 Wilson et al. Journal of the International Society of Sports Nutrition Table 1 HMB effects on indices of skeletal muscle damage and breakdown Experiment Subjects Protocol Diet Duration/dose Additional Timing Damage Outcome control supplements indices Nissen Untrained, Progressive Free Yes 3 weeks, 1.5 or 3 No 1 gram with each of CK, LDH, 3-MH With HMB-Ca CK, LDH, and 3-MH all 1996 [7] college-aged males Weights grams per day 3 meals, No timing decreased in a dose dependent manner HMB-Ca relative to training with 20–60 % declines in CK and LDH and 20 % declines in 3-MH, the marker of protein breakdown Jowko Active, Progressive Free No 3 weeks, 3 grams 20 grams creatine 1 gram with each of CK and Urine 26-46 % decrease in serum and urine urea 2001 [10] college-aged males Weights per day HMB-Ca per day for 7 days 3 meals, No timing and Plasma Urea nitrogen with HMB-Ca and HMB-Ca followed by 10 grams relative to training lowered CK by 189 % per day for 14 days Kreider NCAA Football Instructed to not No 28 days, 3 grams No 1 gram with each of CK No Effect 1999 [15] Players change current per day HMB-Ca 3 meals, No timing training Regimen relative to training Paddon- Untrained 1 isokinetic bout No 6 days prior to No 1 gram with each of CK, Soreness, Arm No Effect Jones college-aged males of exercise for bout, 3 grams 3 meals, No timing girth, Strength 2001 [16] elbow flexors per day HMB-Ca relative to training Wilson Untrained 1 isokinetic, Yes 3 grams HMB-Ca No 60 minutes pre vs. CK, LDH, Soreness Pre Exercise HMB-Ca: Prevented the rise 2013, 2009 [17] college-aged males eccentric bout Immediately post in LDH and tended to decrease soreness. for knee extensors exercise Post exercise HMB-Ca, No effects 10 and flexors suggesting a possible effect of dosage :6 Page 2 of 14 timing on outcomes. Kreider NCAA Football Offseason Strength No 3 grams HMB-Ca No 1 gram with each of CK, LDH No Effect 2000 [18] Players and Conditioning 3 meals, No timing Program relative to training Knitter Trained runners 20 km run No 6 weeks, 3 grams No 1 gram with each of CK HMB-Ca decreased serum CK by 2000 [11] 20–50 yrs of age who per day HMB-Ca 3 meals, No timing approximately 50 % ran a minimum of , relative to training 48 km per week Hoffman NCAA Football Football camp No 10 days, 3 grams No 1 gram with each of CK, soreness No Effect 2004 [19] players per day HMB-Ca 3 meals, No timing relative to training Panton Men and women, Monitored 4 wk No 4 weeks, 3 grams No 1 gram with each of CK CK increased 16 and 46 % in men and et al. divided into untrained high intensity per day HMB-Ca 3 meals, No timing women, respectively, in the placebo group. 2000 [20] and resistance trained progressive relative to training In the HMB group CK increased by 3 % (> 6 months), resistance training and decreased by 12 % in men and 20–40 yrs of age women, respectively Van Untrained Eccentric bout of No 14 days, 0.3 g alpha- 1 gram with each of CK, Soreness Completely prevented exercise induced rise Someran college-aged males free weight exercise 3 grams per day ketoisocaproic acid 3 meals, No timing in CK, and blunted the increase in soreness 2005 [21] for elbow flexors per day relative to training http://www.jissn.com/content/10/1/6 Wilson Table 2 HMB effects on body composition and performance* Experiment Subjects Protocol Periodized Diet Duration/dose Additional Body Performance Outcomes of control supplements composition measures
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