| Title | The Effects of Creatine Monohydrate Supplementation With and Without D-Pinitol on Resistance Training Adaptations. | | Author(s) | Kerksick C, Wilborn C, Campbell W, Harvey T, Marcello B, Roberts M, Parker A, Byars A, Greenwood L, Almada A, Kreider R, Greenwood M | | Institution | 1Health and Exercise Science Department, University of Oklahoma, Norman, Oklahoma; 2Endocrinology and Diabetes Section, Department of Pediatrics, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma; 3Exercise and Sport Science Department, University of Mary-Hardin Baylor, Belton, Texas; 4School of Physical Education and Exercise Science, University of South Florida, Tampa, Floridal; 5Center for Physical Development Excellence, United States Military Academy, West Point, New York; 6Department of Athletics, Stanford University, Palo Alto, California; 7Department of Sports and Exercise Sciences, West Texas A&M University, Canyon, Texas; 8Department of Kinesiology, Angelo State University, San Angelo, Texas; 9Department of Health, Human Performance and Recreation, Baylor University, Waco, Texas; 10IMAGINutrition, Inc., Laguna Niguel, California; and 11Department of Health and Kinesiology, Texas A&M University, College Station, Texas. | | Source | J Strength Cond Res 2009 Oct 24. | | Abstract | Kerksick, C, Wilborn, C, Campbell, W, Harvey, T, Marcello, B, Roberts, M, Parker, A, Byars, A, Greenwood, L, Almada, A, Kreider, R, and Greenwood, M. The effects of creatine monohydrate supplementation with and without D-pinitol on resistance training adaptations. J Strength Cond Res 23(x): 000-000, 2009-Coingestion of D-pinitol with creatine (CR) has been reported to enhance creatine uptake. The purpose of this study was to evaluate whether adding D-pinitol to CR affects training adaptations, body composition, whole-body creatine retention, and/or blood safety markers when compared to CR ingestion alone after 4 weeks of resistance training. Twenty-four resistance trained males were randomly assigned in a double-blind manner to creatine + pinitol (CRP) or creatine monohydrate (CR) prior to beginning a supervised 4-week resistance training program. Subjects ingested a typical loading phase (i.e., 20 g/d for 5 days) before ingesting 5 g/d the remaining 23 days. Performance measures were assessed at baseline (T0), week 1 (T1), and week 4 (T2) and included 1 repetition maximum (1RM) bench press (BP), 1RM leg press (LP), isokinetic knee extension, and a 30-second Wingate anaerobic capacity test. Fasting blood and body composition using dual-energy x-ray absorptiometry (DEXA) were determined at T1 and T3. Data were analyzed by repeated measures analysis of variance (ANOVA). Creatine retention increased (p < 0.001) in both groups as a result of supplementation but was not different between groups (p > 0.05). Significant improvements in upper- and lower-body strength and body composition occurred in both groups. However, significantly greater increases in lean mass and fat-free mass occurred in the CR group when compared to CRP (p <0.05). Adding D-pinitol to creatine monohydrate does not appear to facilitate further physiological adaptations while resistance training. Creatine monohydrate supplementation helps to improve strength and body composition while resistance training. Data from this study assist in determining the potential role the addition of D-pinitol to creatine may aid in facilitating training adaptations to exercise. | | Language | ENG | | Pub Type(s) | JOURNAL ARTICLE
| | PubMed ID | 19858753 |
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