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Effects of β-Alanine on Body Composition and Performance Measures in Collegiate Women.
J Strength Cond Res. 2016 Sep; 30(9):2627-37.JS

Abstract

Outlaw, JJ, Smith-Ryan, AE, Buckley, AL, Urbina, SL, Hayward, S, Wingfield, HL, Campbell, B, Foster, C, Taylor, LW, and Wilborn, CD. Effects of β-alanine on body composition and performance measures in collegiate women. J Strength Cond Res 30(9): 2627-2637, 2016-The purpose of this study was to evaluate the effects of β-alanine (BA) supplementation and resistance training on body composition and performance. In a double-blind placebo-controlled design, 16 untrained collegiate females (mean ± SD: 21.0 ± 2.2 years; 64.8 ± 8.5 kg; 164.5 ± 7.0 cm; 30.1 ± 5.1 percent body fat [%BF]) completed 8 weeks of resistance training while consuming either 3.4 g BA or placebo (PL; 5 g maltodextrin) before training sessions. Training consisted of 4 days per week upper- and lower-body exercises. Lean body mass (LBM), fat mass (FM), and %BF were assessed using dual-energy x-ray absorptiometry. Maximal oxygen consumption (V[Combining Dot Above]O2max), aerobic time to exhaustion, Wingate peak power, bench press and leg press 1RM (BPmax; LPmax), and repetitions at 65% (BPreps; LPreps), vertical jump (VJ), and standing broad jump were assessed using standard National Strength and Conditioning Association guidelines. All measurements were taken at baseline (T1), 4 weeks (T2), and 8 weeks (T3). Repeated-measures analysis of variance and 95% confidence intervals were used to determine significance. Body composition (LBM, FM, and %BF) improved over time (p < 0.01) for both groups. Maximal strength and VJ increased significantly from baseline to T3 (p ≤ 0.05). There was a significant interaction for LPreps (p = 0.040), with only BA group resulting in significantly greater LPreps (p = 0.041) at T2 and T3. Results from this study suggest that 8 weeks, 4 days per week progressive resistance training and BA supplementation may be effective for improving lower-body muscular endurance. β-alanine had no additive effects on body composition or maximal strength in collegiate women.

Links

Publisher Full Text (DOI)

Authors+Show Affiliations

Outlaw JJ
1Human Performance Laboratory, University of Mary Hardin-Baylor, Belton, Texas; 2Applied Physiology Laboratory, Exercise and Sport Science, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina; 3Departmentof Health and Exercise Studies, North Carolina State University, Raleigh, North Carolina; and 4Exercise and Performance Nutrition Laboratory, University of South Florida, Tampa, Florida.
Smith-Ryan AE
No affiliation info available
Buckley AL
No affiliation info available
Urbina SL
No affiliation info available
Hayward S
No affiliation info available
Wingfield HL
No affiliation info available
Campbell B
No affiliation info available
Foster C
No affiliation info available
Taylor LW
No affiliation info available
Wilborn CD
No affiliation info available

MeSH

Absorptiometry, PhotonAdolescentBody CompositionDietary SupplementsDouble-Blind MethodFemaleHumansMuscle FatigueMuscle StrengthMuscle, SkeletalOxygen ConsumptionPhysical EnduranceResistance TrainingYoung Adultbeta-Alanine

Pub Type(s)

Journal Article
Randomized Controlled Trial

Language

eng

PubMed ID

25486294

Clinical Trial Links

Acute Supplementation With Beta-Alanine Improves Performance in Aerobic-anaerobic Transition Zones in Endurance Athletes

Citation

Outlaw, Jordan J., et al. "Effects of β-Alanine On Body Composition and Performance Measures in Collegiate Women." Journal of Strength and Conditioning Research, vol. 30, no. 9, 2016, pp. 2627-37.
Outlaw JJ, Smith-Ryan AE, Buckley AL, et al. Effects of β-Alanine on Body Composition and Performance Measures in Collegiate Women. J Strength Cond Res. 2016;30(9):2627-37.
Outlaw, J. J., Smith-Ryan, A. E., Buckley, A. L., Urbina, S. L., Hayward, S., Wingfield, H. L., Campbell, B., Foster, C., Taylor, L. W., & Wilborn, C. D. (2016). Effects of β-Alanine on Body Composition and Performance Measures in Collegiate Women. Journal of Strength and Conditioning Research, 30(9), 2627-37. https://doi.org/10.1519/JSC.0000000000000665
Outlaw JJ, et al. Effects of β-Alanine On Body Composition and Performance Measures in Collegiate Women. J Strength Cond Res. 2016;30(9):2627-37. PubMed PMID: 25486294.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effects of β-Alanine on Body Composition and Performance Measures in Collegiate Women. AU - Outlaw,Jordan J, AU - Smith-Ryan,Abbie E, AU - Buckley,Amanda L, AU - Urbina,Stacie L, AU - Hayward,Sara, AU - Wingfield,Hailee L, AU - Campbell,Bill, AU - Foster,Cliffa, AU - Taylor,Lem W, AU - Wilborn,Colin D, PY - 2014/12/9/entrez PY - 2014/12/9/pubmed PY - 2016/12/15/medline SP - 2627 EP - 37 JF - Journal of strength and conditioning research JO - J Strength Cond Res VL - 30 IS - 9 N2 - Outlaw, JJ, Smith-Ryan, AE, Buckley, AL, Urbina, SL, Hayward, S, Wingfield, HL, Campbell, B, Foster, C, Taylor, LW, and Wilborn, CD. Effects of β-alanine on body composition and performance measures in collegiate women. J Strength Cond Res 30(9): 2627-2637, 2016-The purpose of this study was to evaluate the effects of β-alanine (BA) supplementation and resistance training on body composition and performance. In a double-blind placebo-controlled design, 16 untrained collegiate females (mean ± SD: 21.0 ± 2.2 years; 64.8 ± 8.5 kg; 164.5 ± 7.0 cm; 30.1 ± 5.1 percent body fat [%BF]) completed 8 weeks of resistance training while consuming either 3.4 g BA or placebo (PL; 5 g maltodextrin) before training sessions. Training consisted of 4 days per week upper- and lower-body exercises. Lean body mass (LBM), fat mass (FM), and %BF were assessed using dual-energy x-ray absorptiometry. Maximal oxygen consumption (V[Combining Dot Above]O2max), aerobic time to exhaustion, Wingate peak power, bench press and leg press 1RM (BPmax; LPmax), and repetitions at 65% (BPreps; LPreps), vertical jump (VJ), and standing broad jump were assessed using standard National Strength and Conditioning Association guidelines. All measurements were taken at baseline (T1), 4 weeks (T2), and 8 weeks (T3). Repeated-measures analysis of variance and 95% confidence intervals were used to determine significance. Body composition (LBM, FM, and %BF) improved over time (p < 0.01) for both groups. Maximal strength and VJ increased significantly from baseline to T3 (p ≤ 0.05). There was a significant interaction for LPreps (p = 0.040), with only BA group resulting in significantly greater LPreps (p = 0.041) at T2 and T3. Results from this study suggest that 8 weeks, 4 days per week progressive resistance training and BA supplementation may be effective for improving lower-body muscular endurance. β-alanine had no additive effects on body composition or maximal strength in collegiate women. SN - 1533-4287 UR - https://www.unboundmedicine.com/medline/citation/25486294/Effects_of_β_Alanine_on_Body_Composition_and_Performance_Measures_in_Collegiate_Women_ DB - PRIME DP - Unbound Medicine ER -