caa a22 4500 463185668 CHVBK 20180406164852.0 cr unu---uuuuu 170326e20070401xx s 000 0 eng 10.1007/s00726-006-0474-z doi (NATIONALLICENCE)springer-10.1007/s00726-006-0474-z Effects of β-alanine supplementation on the onset of neuromuscular fatigue and ventilatory threshold in women [Elektronische Daten] [J. R. Stout, J. T. Cramer, R. F. Zoeller, D. Torok, P. Costa, J. R. Hoffman, R. C. Harris, J. O'Kroy] Summary.: This study examined the effects of 28 days of β-alanine supplementation on the physical working capacity at fatigue threshold (PWCFT), ventilatory threshold (VT), maximal oxygen consumption ( $\dot{\rm V}$ O2-MAX), and time-to-exhaustion (TTE) in women. Twenty-two women (age ± SD 27.4 ± 6.1 yrs) participated and were randomly assigned to either the β-alanine (CarnoSyn™) or Placebo (PL) group. Before (pre) and after (post) the supplementation period, participants performed a continuous, incremental cycle ergometry test to exhaustion to determine the PWCFT, VT, $\dot{\rm V}$ O2-MAX, and TTE. There was a 13.9, 12.6 and 2.5% increase (p < 0.05) in VT, PWCFT, and TTE, respectively, for the β-alanine group, with no changes in the PL (p > 0.05). There were no changes for $\dot{\rm V}$ O2-MAX (p > 0.05) in either group. Results of this study indicate that β-alanine supplementation delays the onset of neuromuscular fatigue (PWCFT) and the ventilatory threshold (VT) at submaximal workloads, and increase in TTE during maximal cycle ergometry performance. However, β-alanine supplementation did not affect maximal aerobic power ( $\dot{\rm V}$ O2-MAX). In conclusion, β-alanine supplementation appears to improve submaximal cycle ergometry performance and TTE in young women, perhaps as a result of an increased buffering capacity due to elevated muscle carnosine concentrations. Springer-Verlag, 2006 Keywords: Carnosine - β-Alanine - Ergogenic aids - Electromyography - Cycle ergometry nationallicence Stout J. R. Department of Health and Exercise Science, University of Oklahoma, Norman, OK, U.S.A. aut Cramer J. T. Department of Health and Exercise Science, University of Oklahoma, Norman, OK, U.S.A. aut Zoeller R. F. Department of Exercise Science and Health Promotion, Florida Atlantic University, Davie, FL, U.S.A. aut Torok D. Department of Exercise Science and Health Promotion, Florida Atlantic University, Davie, FL, U.S.A. aut Costa P. Department of Exercise Science and Health Promotion, Florida Atlantic University, Davie, FL, U.S.A. aut Hoffman J. R. Department of Health and Exercise Science, The College of New Jersey, Ewing, NJ, U.S.A. aut Harris R. C. School of Sport Exercise and Health Sciences, University of Chichester, Chichester, U.K. aut O'Kroy J. Department of Exercise Science and Health Promotion, Florida Atlantic University, Davie, FL, U.S.A. aut Amino Acids Springer-Verlag 32/3(2007-04-01), 381-386 0939-4451 32:3<381 2007 32 726 https://doi.org/10.1007/s00726-006-0474-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00726-006-0474-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Stout J. R. Department of Health and Exercise Science, University of Oklahoma, Norman, OK, U.S.A aut NATIONALLICENCE 700 1- Cramer J. T. Department of Health and Exercise Science, University of Oklahoma, Norman, OK, U.S.A aut NATIONALLICENCE 700 1- Zoeller R. F. Department of Exercise Science and Health Promotion, Florida Atlantic University, Davie, FL, U.S.A aut NATIONALLICENCE 700 1- Torok D. Department of Exercise Science and Health Promotion, Florida Atlantic University, Davie, FL, U.S.A aut NATIONALLICENCE 700 1- Costa P. Department of Exercise Science and Health Promotion, Florida Atlantic University, Davie, FL, U.S.A aut NATIONALLICENCE 700 1- Hoffman J. R. Department of Health and Exercise Science, The College of New Jersey, Ewing, NJ, U.S.A aut NATIONALLICENCE 700 1- Harris R. C. School of Sport Exercise and Health Sciences, University of Chichester, Chichester, U.K aut NATIONALLICENCE 700 1- O'Kroy J. Department of Exercise Science and Health Promotion, Florida Atlantic University, Davie, FL, U.S.A aut NATIONALLICENCE 773 0- Amino Acids Springer-Verlag 32/3(2007-04-01), 381-386 0939-4451 32:3<381 2007 32 726 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer