Affordable Access

deepdyve-link
Publisher Website

Sodium Bicarbonate Ingestion Improves Time-to-Exhaustion Cycling Performance and Alters Estimated Energy System Contribution: A Dose-Response Investigation.

Authors
  • Gurton, William H1
  • Gough, Lewis A2
  • Sparks, S Andy3
  • Faghy, Mark A4
  • Reed, Katharine E1
  • 1 School of Sport, Rehabilitation and Exercise Science, University of Essex, Colchester, United Kingdom. , (United Kingdom)
  • 2 Research Centre for Life and Sport Sciences (CLaSS) School of Health Sciences, Birmingham City University, Birmingham, United Kingdom. , (United Kingdom)
  • 3 Sports Nutrition and Performance Group, Department of Sport and Physical Activity, Edge Hill University, Ormskirk, United Kingdom. , (United Kingdom)
  • 4 Human Sciences Research Centre, University of Derby, Derby, United Kingdom. , (United Kingdom)
Type
Published Article
Journal
Frontiers in Nutrition
Publisher
Frontiers Media SA
Publication Date
Jan 01, 2020
Volume
7
Pages
154–154
Identifiers
DOI: 10.3389/fnut.2020.00154
PMID: 33015125
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

This study investigated the effects of two sodium bicarbonate (NaHCO3) doses on estimated energy system contribution and performance during an intermittent high-intensity cycling test (HICT), and time-to-exhaustion (TTE) exercise. Twelve healthy males (stature: 1.75 ± 0.08 m; body mass: 67.5 ± 6.3 kg; age: 21.0 ± 1.4 years; maximal oxygen consumption: 45.1 ± 7.0 ml.kg.min-1) attended four separate laboratory visits. Maximal aerobic power (MAP) was identified from an incremental exercise test. During the three experimental visits, participants ingested either 0.2 g.kg-1 BM NaHCO3 (SBC2), 0.3 g.kg-1 BM NaHCO3 (SBC3), or 0.07 g.kg-1 BM sodium chloride (placebo; PLA) at 60 min pre-exercise. The HICT involved 3 × 60 s cycling bouts (90, 95, 100% MAP) interspersed with 90 s recovery, followed by TTE cycling at 105% MAP. Blood lactate was measured after each cycling bout to calculate estimates for glycolytic contribution to exercise. Gastrointestinal (GI) upset was quantified at baseline, 30 and 60 min post-ingestion, and 5 min post-exercise. Cycling TTE increased for SBC2 (+20.2 s; p = 0.045) and SBC3 (+31.9 s; p = 0.004) compared to PLA. Glycolytic contribution increased, albeit non-significantly, during the TTE protocol for SBC2 (+7.77 kJ; p = 0.10) and SBC3 (+7.95 kJ; p = 0.07) compared to PLA. GI upset was exacerbated post-exercise after SBC3 for nausea compared to SBC2 and PLA (p < 0.05), whilst SBC2 was not significantly different to PLA for any symptom (p > 0.05). Both NaHCO3 doses enhanced cycling performance and glycolytic contribution, however, higher doses may maximize ergogenic benefits. Copyright © 2020 Gurton, Gough, Sparks, Faghy and Reed.

Report this publication

Statistics

Seen <100 times