Montalvo-Alonso Juan Jesús, Munilla César, Garriga-Alonso Laura, Ferragut Carmen, Valadés David, Gonzalo-Encabo Paola, Pérez-López Alberto
Departamento de Ciencias Biomédicas, Área de Educación Física y Deportiva, Facultad de Medicina y Ciencias de la Salud, Universidad de Alcalá, 28801 Madrid, Spain.
Nutrients. 2024 Dec 19;16(24):4382. doi: 10.3390/nu16244382.
Caffeine and sodium bicarbonate individually enhance muscular endurance by delaying fatigue, but their combined effects have scarcely been studied. : This study aimed to evaluate the acute effects of co-ingesting caffeine and sodium bicarbonate on muscular endurance at different loads in bench press and back squat exercises. : Twenty-seven recreationally trained participants (female/male: 14/14; age: 23 ± 3.6 years) were randomized to four conditions in a double-blind, crossover design: (a) sodium bicarbonate and caffeine (NaHCO + CAF); (b) sodium bicarbonate (NaHCO); (c) caffeine (CAF); (d) placebo (PLA); ingesting 0.3 g/kg NaHCO, 3 mg/kg caffeine or placebo (maltodextrin). Participants performed two muscle endurance tests on bench press and back squat exercises at 65% and 85% 1RM, performing as many repetitions as possible in one set until task failure. : CAF increased the number of repetitions ( < 0.001; η = 0.111), mean velocity (V, = 0.043, η = 0.16), and mean power output (W, = 0.034, η = 0.15) compared to placebo. These effects were observed in back squat exercise at 65%1RM in V (3.7%, = 0.050, g = 1.144) and W (5.2%, = 0.047, g = 0.986) and at 85%1RM in V (5.4%, = 0.043, g = 0.22) and W (5.5%, = 0.050, g = 0.25). No ergogenic effects were found in NaHCO + CAF) or NaHCO conditions. : CAF increased muscular endurance performance in male and female participants by increasing the number of repetitions, mean velocity, and power output; however, when NaHCO was ingested, these effects were not detected.
咖啡因和碳酸氢钠各自通过延迟疲劳来提高肌肉耐力，但它们的联合作用几乎未被研究。本研究旨在评估同时摄入咖啡因和碳酸氢钠对卧推和深蹲练习中不同负荷下肌肉耐力的急性影响。27名接受过休闲训练的参与者（女性/男性：14/14；年龄：23±3.6岁）被随机分为四个组，采用双盲、交叉设计：（a）碳酸氢钠和咖啡因（NaHCO₃ + CAF）；（b）碳酸氢钠（NaHCO₃）；（c）咖啡因（CAF）；（d）安慰剂（PLA）；分别摄入0.3 g/kg碳酸氢钠、3 mg/kg咖啡因或安慰剂（麦芽糊精）。参与者在卧推和深蹲练习中以65%和85%的1RM进行了两项肌肉耐力测试，在一组中尽可能多地重复动作，直到任务失败。与安慰剂相比，咖啡因增加了重复次数（P < 0.001；η = 0.111）、平均速度（V，P = 0.043，η = 0.16）和平均功率输出（W，P = 0.034，η = 0.15）。这些影响在深蹲练习中65%1RM时的V（3.7%，P = 0.050，g = 1.144）和W（5.2%，P = 0.047，g = 0.986）以及85%1RM时的V（5.4%，P = 0.043，g = 0.22）和W（5.5%，P = 0.050，g = 0.25）中观察到。在NaHCO₃ + CAF或NaHCO₃组中未发现促力作用。咖啡因通过增加重复次数、平均速度和功率输出来提高男性和女性参与者的肌肉耐力表现；然而，当摄入碳酸氢钠时，未检测到这些影响。
