Warm-Up Intensity Does Not Affect the Ergogenic Effect of Sodium Bicarbonate in Adult Men

Autor(es)

Jones, Rebecca L. ^{[1, 2]} ; Stellingwerff, Trent ^{[3, 4]} ; Swinton, Paul ^[5] ; Artioli, Guilherme Giannini ^[6] ; Saunders, Bryan ^{[7, 6]} ; Sale, Craig ^[1]

Afiliação do(s) autor(es)

^[1] Nottingham Trent Univ, Sch Sci & Technol, Musculoskeletal Physiol Res Grp, Sport Hlth & Performance Enhancement SHAPE Res Ct, Nottingham - England

^[2] Univ Bedfordshire, Sch Sport Sci & Phys Act, Inst Sport & Phys Act Res, Bedford - England

^[3] Canadian Sport Inst Pacific, Victoria, BC - Canada

^[4] Univ Victoria British Columbia, Exercise Sci Phys & Hlth Educ, Victoria, BC - Canada

^[5] Robert Gordon Univ, Sch Hlth Sci, Fac Hlth & Social Care Bldg, Aberdeen - Scotland

^[6] Univ Sao Paulo, Fac Med FMUSP, Sch Phys Educ & Sport, Rheumatol Div, Appl Physiol & Nutr Res Grp, Sao Paulo - Brazil

^[7] Univ Sao Paulo, Fac Med FMUSP, Inst Orthopaed & Traumatol, Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: INTERNATIONAL JOURNAL OF SPORT NUTRITION AND EXERCISE METABOLISM; v. 31, n. 6, p. 482-489, NOV 2021.
• Citações Web of Science: 1

Resumo

This study determined the influence of a high- (HI) versus low-intensity (LI) cycling warm-up on blood acid-base responses and exercise capacity following ingestion of sodium bicarbonate (SB; 0.3 g/kg body mass) or a placebo (PLA; maltodextrin) 3 hr prior to warm-up. Twelve men (21 +/- 2 years, 79.2 +/- 3.6 kg body mass, and maximum power output {[}W-max] 318 +/- 36 W) completed a familiarization and four double-blind trials in a counterbalanced order: HI warm-up with SB, HI warm-up with PLA, LI warm-up with SB, and LI warm-up with PLA. LI warm-up was 15 min at 60% W-max, while the HI warm-up (typical of elites) featured LI followed by 2 x 30 s (3-min break) at W-max, finishing 30 min prior to a cycling capacity test at 110% W-max. Blood bicarbonate and lactate were measured throughout. SB supplementation increased blood bicarbonate (+6.4 mmol/L; 95% confidence interval, CI {[}5.7, 7.1]) prior to greater reductions with HI warm-up (-3.8 mmol/L; 95% CI {[}-5.8, -1.8]). However, during the 30-min recovery, blood bicarbonate rebounded and increased in all conditions, with concentrations similar to 5.3 mmol/L greater with SB supplementation (p <.001). Blood bicarbonate significantly declined during the cycling capacity test at 110% W-max with greater reductions following SB supplementation (-2.4 mmol/L; 95% CI {[}-3.8, -0.90]). Aligned with these results, SB supplementation increased total work done during the cycling capacity test at 110% W-max (+8.5 kJ; 95% CI {[}3.6, 13.4], similar to 19% increase) with no significant main effect of warm-up intensity (+0.0 kJ; 95% CI {[}-5.0, 5.0]). Collectively, the results demonstrate that SB supplementation can improve HI cycling capacity irrespective of prior warm-up intensity, likely due to blood alkalosis. (AU)

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