Mor Ahmet, Acar Kürşat, Alexe Dan Iulian, Mor Hakkı, Abdioğlu Mekki, Man Maria Cristina, Karakaș Fatih, Waer Fatma Ben, Yılmaz Ali Kerim, Alexe Cristina Ioana
Department of Coaching Education, Faculty of Sport Sciences, Sinop University, Sinop, Türkiye.
Department of Physical Education and Sports, Faculty of Sport Sciences, Sinop University, Sinop, Türkiye.
Front Nutr. 2024 Jul 9;11:1359999. doi: 10.3389/fnut.2024.1359999. eCollection 2024.
The effects of direct nutritional supplements on athletic performance are still being investigated and arouse curiosity. Only one study in the literature was found that investigated the kicking speed performance of futsal players following low-dose caffeine supplementation (3 mg/kg); thus, the question of whether caffeine supplementation improves kicking speed as well as essential physical parameters in soccer players is still controversial. Therefore, the aim of this study was to determine the effect of caffeine supplementation on vertical jump (VJ), sprint, reaction time, balance, change of direction (COD), and ball-kicking speed in soccer players. In a double-blind, cross-over design, nine moderately trained male soccer players (21.11 ± 2.02 years, 171.22 ± 6.14 cm, 71.78 ± 10.02 kg) consumed caffeine (6 mg/kg) or a placebo 60 min before completing balance, reaction time, vertical jump, agility, 30 m sprint, and ball-kicking speed tests. Greater VJ height ( = 0.01) and power ( = 0.08), and faster completion time according to the Illinois Agility Test ( = 0.08) were found following caffeine supplementation compared to placebo. Elapsed time ( = 0.01), average ( = 0.01) time, and the slowest reaction times ( = 0.016) were significantly reduced after caffeine consumption compared to placebo supplementation. Caffeine intake significantly improved VJ, agility, and reaction time ( < 0.05) but did not affect 30 m sprint, ball-kicking speed, balance, and RPE values in soccer players ( > 0.05). Although non-significant, caffeine intake also improved sprint (0.67%) and ball kicking (2.7%) performance percentages. Also, caffeine consumption did not induce dehydration, and the athletes' body hydration levels were normal. These findings support the use of caffeine supplementation as an effective nutritional ergogenic aid to enhance anaerobic performance, at least for vertical jumps, COD speed, and reaction time, in trained male soccer players.
直接营养补充剂对运动表现的影响仍在研究中，并引发了人们的好奇心。在文献中仅发现一项研究，该研究调查了五人制足球运动员在补充低剂量咖啡因（3毫克/千克）后的踢球速度表现；因此，补充咖啡因是否能提高足球运动员的踢球速度以及基本身体参数这一问题仍存在争议。因此，本研究的目的是确定补充咖啡因对足球运动员垂直跳跃（VJ）、短跑、反应时间、平衡、变向（COD）和踢球速度的影响。在一项双盲、交叉设计中，九名中等水平训练的男性足球运动员（21.11±2.02岁，171.22±6.14厘米，71.78±10.02千克）在完成平衡、反应时间、垂直跳跃、敏捷性、30米短跑和踢球速度测试前60分钟摄入咖啡因（6毫克/千克）或安慰剂。与安慰剂相比，补充咖啡因后发现垂直跳跃高度（P = 0.01）和功率（P = 0.08）更大，并且根据伊利诺伊敏捷性测试完成时间更快（P = 0.08）。与补充安慰剂相比，摄入咖啡因后经过时间（P = 0.01）、平均（P = 0.01）时间和最慢反应时间（P = 0.016）显著缩短。咖啡因摄入显著改善了足球运动员的垂直跳跃、敏捷性和反应时间（P < 0.05），但对30米短跑、踢球速度、平衡和主观用力程度（RPE）值没有影响（P > 0.05）。虽然不显著，但咖啡因摄入也提高了短跑（提高0.67%）和踢球（提高2.7%）的表现百分比。此外，咖啡因摄入并未导致脱水，运动员的身体水合水平正常。这些发现支持在训练有素的男性足球运动员中使用咖啡因补充剂作为一种有效的营养性促力剂，以提高无氧运动表现，至少对于垂直跳跃、COD速度和反应时间而言。
