Kaçoğlu Celil, Kirkaya İzzet, Ceylan Halil İbrahim, de Assis Gilmara Gomes, Almeida-Neto Paulo, Bayrakdaroğlu Serdar, Chaves Oliveira César, Özkan Ali, Nikolaidis Pantelis T
Department of Coaching Education, Faculty of Sport Sciences, Eskişehir Technical University, Eskişehir 26555, Türkiye.
Department of Coaching Education, Faculty of Sport Sciences, Yozgat Bozok University, Yozgat 66100, Türkiye.
Sports (Basel). 2024 Jul 29;12(8):206. doi: 10.3390/sports12080206.
Caffeine and sodium bicarbonate are extensively researched ergogenic aids known for their potential to enhance exercise performance. The stimulant properties of caffeine on the central nervous system, coupled with the buffering capacity of sodium bicarbonate, have been associated with improved athletic performance. This has led to investigations of their combined effects on strength. The aim of the present study is to investigate the effect of isolated and combined caffeine and sodium bicarbonate consumption on strength using the isometric mid-thigh pull test (IMTP). Nineteen male college students (age 23.6 ± 1.6 years) participated in this crossover, double-blind, placebo-controlled study. They were exposed to the following conditions: control (no supplement), placebo (20 g maltodextrin), caffeine (6 mg/kg), sodium bicarbonate (0.3 g/kg), and a combination of caffeine and sodium bicarbonate. Supplements and placebo were diluted in water and consumed 60 min prior to the IMTP tests. Two 5 s IMTP trials were performed at 40-60% and 60-80% of One Repetition of Maximum (1RM) with a 60 s rest between. Consumption of caffeine or Caf + NaHCO did not significantly change peak IMTP strength values at any intensity ( = 0.110). The peak IMTP values did not show significant differences between conditions or from control condition values (1091 ± 100 N) to Caf (1224 ± 92 N), NaHCO (1222 ± 74 N), and Caf ± NaHCO (1152 ± 109 N). However, the test of the results of the ANOVA analysis of repeated measures of effect within the caffeine condition was significant for the increase in IMTP relative strength compared to control ( < 0.05). Thus, the IMTP force values increased significantly from control to Caf ( = 0.016) and from Pla to Caf ( = 0.008), but not for other comparisons ( > 0.05). In summary, caffeine supplementation alone, taken 60 min before exercise, positively affects submaximal strength performance. In contrast, sodium bicarbonate, whether taken alone or in combination with caffeine, does not enhance submaximal strength in the IMTP tests.
咖啡因和碳酸氢钠是经过广泛研究的促力辅助剂，因其具有提高运动表现的潜力而闻名。咖啡因对中枢神经系统的刺激特性，再加上碳酸氢钠的缓冲能力，与运动表现的改善有关。这引发了对它们联合作用于力量的研究。本研究的目的是使用等长中大腿拉力测试（IMTP）来探究单独摄入和联合摄入咖啡因与碳酸氢钠对力量的影响。19名男性大学生（年龄23.6±1.6岁）参与了这项交叉、双盲、安慰剂对照研究。他们经历了以下几种情况：对照组（不补充）、安慰剂组（20克麦芽糊精）、咖啡因组（6毫克/千克）、碳酸氢钠组（0.3克/千克）以及咖啡因与碳酸氢钠联合组。补充剂和安慰剂用水稀释后，在IMTP测试前60分钟服用。在最大重复次数（1RM）的40 - 60%和60 - 80%强度下进行两次5秒的IMTP试验，两次试验之间休息60秒。摄入咖啡因或咖啡因与碳酸氢钠联合组在任何强度下都未显著改变IMTP峰值力量值（P = 0.110）。IMTP峰值在不同情况之间或与对照组值（1091±100牛）相比，咖啡因组（1224±92牛）、碳酸氢钠组（1222±74牛）以及咖啡因与碳酸氢钠联合组（1152±109牛）之间均未显示出显著差异。然而，在咖啡因情况下，对重复测量效应进行方差分析的结果测试显示，与对照组相比，IMTP相对力量有所增加，具有显著性（P < 0.05）。因此，IMTP力量值从对照组到咖啡因组显著增加（P = 0.016），从安慰剂组到咖啡因组也显著增加（P = 0.008），但其他比较则无显著差异（P > 0.05）。总之，运动前60分钟单独补充咖啡因对次最大力量表现有积极影响。相比之下，碳酸氢钠无论是单独服用还是与咖啡因联合服用，在IMTP测试中都不会增强次最大力量。
