Sodium bicarbonate improves 4 km time trial cycling performance when individualised to time to peak blood bicarbonate in trained male cyclists

Gough, L., Deb, S., Sparks, S.A. and McNaughton, L. 2018. Sodium bicarbonate improves 4 km time trial cycling performance when individualised to time to peak blood bicarbonate in trained male cyclists. Journal of Sports Sciences. 36 (15), pp. 1705-1712. doi:10.1080/02640414.2017.1410875

TitleSodium bicarbonate improves 4 km time trial cycling performance when individualised to time to peak blood bicarbonate in trained male cyclists
TypeJournal article
AuthorsGough, L., Deb, S., Sparks, S.A. and McNaughton, L.
Abstract

The aim of this study was to investigate the effects of sodium bicarbonate (NaHCO3) on 4 km cycling time trial (TT) performance when individualised to a predetermined time to peak blood bicarbonate (HCO3−). Eleven male trained cyclists volunteered for this study (height 1.82 ± 0.80 m, body mass (BM) 86.4 ± 12.9 kg, age 32 ± 9 years, peak power output (PPO) 382 ± 22 W). Two trials were initially conducted to identify time to peak HCO3− following both 0.2 g.kg−1 BM (SBC2) and 0.3 g.kg−1 BM (SBC3) NaHCO3. Thereafter, on three separate occasions using a randomised, double-blind, crossover design, participants completed a 4 km TT following ingestion of either SBC2, SBC3, or a taste-matched placebo (PLA) containing 0.07 g.kg−1 BM sodium chloride (NaCl) at the predetermined individual time to peak HCO3−. Both SBC2 (−8.3 ± 3.5 s; p < 0.001, d = 0.64) and SBC3 (−8.6 ± 5.4 s; p = 0.003, d = 0.66) reduced the time to complete the 4 km TT, with no difference between SBC conditions (mean differ- ence = 0.2 ± 0.2 s; p = 0.87, d = 0.02). These findings suggest trained cyclists may benefit from individualising NaHCO3 ingestion to time to peak HCO3− to enhance 4 km TT performance.

JournalJournal of Sports Sciences
Journal citation36 (15), pp. 1705-1712
ISSN0264-0414
Year2018
PublisherTaylor & Francis
Accepted author manuscriptSodium bicarbonate improves 4 km time trial cycling performance when individualised to time to peak blood bicarbonate in trained male cyclists..pdf
Digital Object Identifier (DOI)doi:10.1080/02640414.2017.1410875
Publication dates
Published online29 Nov 2017
Published in print2018

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