Effect of Acute Sodium Bicarbonate Intake on Sprint-Intermittent Performance and Blood Biochemical Responses in Well-Trained Sprinters

IF 1.3 Q3 SPORT SCIENCES
M. F. Abumoh'd, Walid Alsababha, Yazan Haddad, Ghaid Obeidat, Yaser Telfah
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引用次数: 2

Abstract

The present study was designed to determine the acute effect of sodium bicarbonate (NaHCO3) on the number of sprint repetitions during sprint high-intensity intermittent testing. In addition, blood biochemical (pH, HCO3-, and lactate) responses measured in three occasions were investigated. Thirteen male well-trained sprinters (24.65±3.44 yrs) performed two consecutive trials (7 days apart). Athletes were assigned randomly either to ingest a single dose of NaHCO3 (0.3 g/kg) 1 h prior to exercise or placebo using a double-blind crossover design. The intermittent sprint test consisted of 60 s treadmill sprints (90% of maximal work done) and 30-s recovery repeated intermittently until volitional exhaustion. Blood samples were collected from all athletes before exercise, after 1 h of dose intake, and after exercise in each trial. Paired sample t-testing showed that athletes complete significantly more sprint repetitions (p=0.036) during the intermittent sprint test with NaHCO3 (6.846±3.114) than with the placebo (5.538±3.872). Data also revealed no differences between trials in all blood responses at pre-exercise. After 1 h of dose consumption, however, blood pH and HCO3- were higher with NaHCO3 than with placebo (p<0.05), but no differences were noted in lactate between trials (p>0.05). After completion of the test, all blood responses were significantly higher with NaHCO3 than with placebo (p<0.05). In conclusion, intake of 0.3 g/kg of NaHCO3 1 h prior to treadmill sprint-intermittent performance increased sprint repetitions in well-trained sprinters, probably due to activated glycolysis caused by intracellular protons efflux into the blood.
急性碳酸氢钠摄入对训练有素的短跑运动员短跑-间歇表现和血液生化反应的影响
本研究旨在确定碳酸氢钠(NaHCO3)对短跑高强度间歇测试中短跑重复次数的急性影响。此外,血液生化(pH, HCO3-和乳酸)反应测量在三种情况下进行了调查。13名训练有素的男性短跑运动员(24.65±3.44岁)进行了两次连续试验(间隔7天)。采用双盲交叉设计,运动员被随机分配在运动前1小时摄入单剂量NaHCO3 (0.3 g/kg)或安慰剂。间歇冲刺测试包括60秒的跑步机冲刺(最大工作量的90%)和30秒的间歇恢复,直到意志疲惫。在每次试验中,所有运动员在运动前、服药1小时后和运动后采集血样。配对样本t检验显示,间歇冲刺试验中,NaHCO3组运动员完成的冲刺次数(6.846±3.114)明显多于安慰剂组(5.538±3.872),差异有统计学意义(p=0.036)。数据还显示,在运动前的所有血液反应中,试验之间没有差异。然而,在给药1 h后,NaHCO3组的血pH和HCO3-高于安慰剂组(p0.05)。测试完成后,NaHCO3组的所有血液反应均显著高于安慰剂组(p<0.05)。综上所述,训练有素的短跑运动员在跑步机间歇冲刺前1小时摄入0.3 g/kg的nahco31会增加短跑重复次数,这可能是由于细胞内质子外排到血液中导致糖酵解被激活。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
2.80
自引率
0.00%
发文量
14
审稿时长
9 weeks
期刊介绍: MJSSM covers all aspects of sports science and medicine; all clinical aspects of exercise, health, and sport; exercise physiology and biophysical investigation of sports performance; sport biomechanics; sports nutrition; rehabilitation, physiotherapy; sports psychology; sport pedagogy, sport history, sport philosophy, sport sociology, sport management; and all aspects of scientific support of the sports coaches from the natural, social and humanistic side.
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