Warm-up intensity does not affect the ergogenic effect of sodium bicarbonate in adult men
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Authors
Jones, Rebecca LouiseStellingwerff, Trent
Artioli, Guilherme Giannini
Saunders, Bryan
Sale, Craig
Swinton, Paul
Affiliation
University of BedfordshireCanadian Sport Institute–Pacific
University of Victoria
Robert Gordon University
University of São Paulo
Nottingham Trent University
Issue Date
2021-09-03Subjects
supplementationhigh-intensity exercise
low-intensity
buffering
Subject Categories::C600 Sports Science
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This study determined the influence of a high (HI) vs. low-intensity (LI) cycling warm-up on blood acid-base responses and exercise capacity following ingestion of sodium bicarbonate (SB; 0.3 g·kg-1 body-mass (BM)) or a placebo (PLA; maltodextrin) 3-hours prior to warm-up. Twelve men (21±2 years, 79.2±3.6 kg BM, maximum power output (Wmax) 318±36 W) completed a familiarisation and four double-blind trials completed in a counterbalanced order: HI warm-up with SB (HISB); HI warm-up with PLA (HIPLA); LI warm-up with SB (LISB); and LI warm-up with PLA (LIPLA). LI warm-up was 15-minutes at 60%Wmax, while the HI warm-up (typical of elites) featured LI followed by 2 x 30-sec (3-minute break) at Wmax, finishing 30-minute prior to a cycling capacity test at 110%Wmax (CCT110%). Blood bicarbonate and lactate were measured throughout. SB supplementation increased blood bicarbonate (+6.4 [95%CI: 5.7 to 7.1 mmol·L-1]) prior to greater reductions with high intensity warm-up (-3.8 [95%CI: -5.8 to -1.8 mmol·L-1]). However, during the 30-minute recovery, blood bicarbonate rebounded and increased in all conditions, with concentrations ~5.3mmol·L-1 greater with SB supplementation (P<0.001). Blood bicarbonate significantly declined during the CCT110% with greater reductions following SB supplementation (-2.4 [95%CI: -3.8 to -0.90 mmol·L-1]). Aligned with these results, SB supplementation increased total work done during the CCT110% (+8.5 [95%CI: 3.6 to 13.4 kJ], ~19% increase) with no significant main effect of warm-up intensity (+0.0 [95%CI: -5.0 to 5.0 kJ). Collectively, the results demonstrate that SB supplementation can improve HI cycling capacity irrespective of prior warm-up intensity, likely due to blood alkalosis.Citation
Jones RL, Stellingwerff T, Swinton P, Artioli GG, Saunders B, Sale C (2021) 'Warm-up intensity does not affect the ergogenic effect of sodium bicarbonate in adult men', International Journal of Sport Nutrition and Exercise Metabolism, 31 (6), pp.482-489.Publisher
Human KineticsPubMed ID
3448000Additional Links
https://journals.humankinetics.com/view/journals/ijsnem/aop/article-10.1123-ijsnem.2021-0076/article-10.1123-ijsnem.2021-0076.xmlType
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enISSN
1526-484Xae974a485f413a2113503eed53cd6c53
10.1123/ijsnem.2021-0076
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