Oral but Not Topical Sodium Bicarbonate Improves Repeated Sprint Performance During Simulated Soccer Match Play Exercise in Collegiate Athletes

Gurton, William H. and Gough, Lewis A. and Siegler, Jason C. and Lynn, Anthony and Ranchordas, Mayur K. (2024) Oral but Not Topical Sodium Bicarbonate Improves Repeated Sprint Performance During Simulated Soccer Match Play Exercise in Collegiate Athletes. International Journal of Sport Nutrition and Exercise Metabolism. ISSN 1526-484X

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Abstract

This study investigated the effect of oral and topical sodium bicarbonate (SB) on soccer-specific performance during simulated soccer exercise. In a block randomized, double-blind, crossover design, ten collegiate male soccer players (stature: 181.7 ± 3.2 cm, body mass: 81.7 ± 10.5 kg) performed soccer-specific performance tests (countermovement jumps, Illinois agility, 8 x 25 m repeated sprints) throughout a 90 min soccer-specific aerobic field test (SAFT90) following 0.3 g/kg body mass (BM) SB in capsules (SB-ORAL), 0.9036 g/kg BM PR Lotion (SB-LOTION) or placebo capsules and lotion (PLA). Soccer-specific performance tests were conducted pre-SAFT90, during half-time and post-SAFT90. Blood samples were analyzed for acid-base balance (pH; bicarbonate, HCO3-) and strong ions (sodium, Na+; potassium, K+). Average sprint times were quicker for SB-ORAL than PLA during half-time (3.7%; p = .049; g = .57) and post-SAFT90 (4.9%; p = .041; g = .66). SB-ORAL increased pH and HCO3- pre-warm-up and during half-time (p < .05), and lowered K+ during half-time (p = .035) compared with PLA. SB-LOTION increased pH (p = .019) and lowered K+ (p = .012) during half-time compared with PLA. SB-LOTION increased Na+ post-exercise compared with PLA (p = .008). Repeated sprint times during simulated soccer exercise improved for SB-ORAL, which might have been mechanistically underpinned by elevated blood buffering capacity and greater regulation of strong ion concentration. Consuming SB in capsules is a more effective strategy than topical SB application for improving blood buffering capacity and repeated sprint performance throughout competitive soccer matches.

Item Type:	Article
Identification Number:	10.1123/ijsnem.2024-0059
Dates:	Date Event 3 July 2024 Accepted 2 September 2024 Published Online
Uncontrolled Keywords:	acid–base balance, strong ions, ergogenic aids, lotion, agility
Subjects:	CAH03 - biological and sport sciences > CAH03-02 - sport and exercise sciences > CAH03-02-01 - sport and exercise sciences
Divisions:	Faculty of Health, Education and Life Sciences > College of Life Sciences
Depositing User:	Lewis Gough
Date Deposited:	04 Sep 2024 14:54
Last Modified:	04 Sep 2024 14:54
URI:	https://www.open-access.bcu.ac.uk/id/eprint/15753

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