17th Annual ECSS-Congress, Bruges 2012

Abstract details

Abstract-ID: 1132
Session: [E-POS] E-Poster
Lecture room: E-Poster screens
Date & time: 24.06.2015 / -
Authors: Cunha, V.C.R.1, Gomes, R.V.2, Zourdos, M.C.3, Moreira, A.2, Aoki, M.S.2, Capitani, C.D.1
Institution: 1: University of Campinas (Limeira, Brazil), 2: University of São Paulo (São Paulo, Brazil), 3: Florida Atlantic University (Boca Raton, USA)
Department: Nutrition
Country: Brazil
Abstract text Introduction The primary aim of this study was to investigate the effect of sodium citrate (SC) supplementation on skilled tennis performance. Methods Ten Brazilian nationally ranked young male tennis players (age: 17.0 ± 1.2 years; height: 176.7 ± 5.2cm; weight: 68.4 ± 7.9kg; body fat: 11.7 ± 1.4%) participated in this crossover, placebo-controlled, double-blind study. The experimental study design compromised three days: day-1 was used as a familiarization session for selected tests (the skill tennis performance test [STPT] and the repeated-sprint ability shuttle test [RSA]), day-2 (3 days after day-1) and day-3 (10 days after day-2) were experimental testing sessions. Upon arrival (baseline-BL) in the experimental sessions, a baseline (BL) blood sample was collected for metabolic analysis of metabolic parameters (i.e. base excess-BE, pH, bicarbonate-HCO3, and blood lactate-[La]). Following blood collection subjects ingested either SC (0.5g.kg-1BW in capsules of 500mg) or a placebo (PLA-NaCl 0.1g.kg-1BW + Pounder 0.4g.kg-1BW in capsules of 500mg). Two hours later, a pre-match blood sample was collected then STPT and RSA tests were performed followed by a 1-hour simulated match. Immediately following the simulated match, a post-match blood sample was collected, and STPT, and RSA tests were again administered. Finally, 30-minutes later subjects recorded a session-RPE and completed a gastrointestinal (GI) questionnaire. Results There was no difference (p>0.05) between conditions for metabolic parameters at BL. A significant increase in all metabolic parameters (BE, pH, HCO3, [La]; p<0.05) was detected from BL to pre-match and was sustained at post-match in SC. Additionally, each metabolic parameter was greater (BE, pH, HCO3, [La]; p<0.05) in SC trail compared to PLA trial at pre- and post-match time points. A greater shot consistency (p<0.05) at post-match in the STPT was observed in SC compared to PLA. Furthermore, a greater amount of games won was noticed in the SC condition (vs. PLA; p<0.05) during the simulated match. There was no difference (p>0.05) between conditions for RSA performance or session-RPE score. Importantly, no subjects reported any severe GI distress symptoms during either condition. Discussion CS supplementation significantly increased all metabolic parameters (i.e. BE, pH, HCO3, [La]) and enhanced skilled tennis performance (i.e. percent shot consistency and games won during simulated match play) compared to a PLA condition. Moreover, no players reported any significant GI discomfort following SC supplementation. Therefore, from a practical perspective, it appears that SC supplementation can be safely and effectively utilized in tennis players to enhance specific skill performance. email: caroline.capitani@fca.unicamp.br
Topic: Nutrition
Keyword I: buffering agents
Keyword II: acidosis
Keyword III: tennis performance