Changes in acid-base balance during simulated soccer match-play

Russell, Mark and Kingsley, Michael (2012) Changes in acid-base balance during simulated soccer match-play. Journal of Strength and Conditioning Research, 26 (9). pp. 2593-2599. ISSN 1533-4287

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Official URL: http://dx.doi.org/10.1519/JSC.0b013e31823f284e

Abstract

This study evaluated changes in markers of acid-base balance that occurred during simulated soccer match-play. Sixteen academy soccer players participated in a soccer match simulation (SMS) that consisted of 90 min of soccer-specific exercise with skills throughout. Blood samples were obtained before exercise (pre-exercise), and every 15-min during the simulation (15, 30, 45, 60, 75 and 90-min), and 10 min into the half-time break (half-time). Blood lactate concentrations were elevated throughout exercise (Pre exercise: 1.5 ± 0.12 mmol·L; 90 min: 6.1 ± 0.7 mmol·L, time effect: P<0.01, partial-eta = 0.740). Relative to pre exercise values, actual blood bicarbonate (Pre-exercise: 28.02 ± 0.92 mmol·L; 90 min: 21.73 ± 0.65 mmol·L, time effect = P<0.01, partial-eta = 0.680), standard blood bicarbonate (Pre-exercise: 25.97 ± 0.43 mmol·L; 90 min: 22.87 ± 0.31 mmol·L, time effect = P<0.01, partial-eta = 0.667), base excess (Pre-exercise: 2.40 ± 0.54 mmol·L, 90 min: -1.57 ± 0.39 mmol·L, time effect = P<0.01, partial-eta = 0.664) and pH (Pre-exercise: 7.44 ± 0.01 units; 90 min: 7.39 ± 0.01 units, time effect = P<0.01, partial-eta = 0.542) were depressed throughout exercise. Interestingly, blood bicarbonate, base excess and pH recovered at half-time (P>0.05). This is the first study to provide data concerning the acid-base balance of familiarized soccer players during exercise that simulates soccer match-play. These findings suggest that: (1) blood pH is reduced during soccer-specific exercise, and (2) although buffering capacity is reduced throughout exercise, it returns to normal during half-time. Further research is warranted to develop interventions that can maintain acid-base balance throughout the full duration of a soccer match.

Item Type: Article
Uncontrolled Keywords: fatigue, football, intermittent exercise, buffer
Subjects: C600 Sports Science
Department: Faculties > Health and Life Sciences > School of Life Sciences > Sport, Exercise and Rehabilitation
Depositing User: Linda Barlow
Date Deposited: 14 May 2012 14:22
Last Modified: 10 Aug 2015 11:34
URI: http://nrl.northumbria.ac.uk/id/eprint/7036

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