Exercise Physiology Laboratory, Camilo José Cela University, 28692 Madrid, Spain.
Strength Training & Neuromuscular Performance (STreNgthP) Research Group, Camilo José Cela University, 28692 Madrid, Spain.
Nutrients. 2023 Feb 27;15(5):1178. doi: 10.3390/nu15051178.
This overview review aimed to describe the evolution of the characteristics of the research on caffeine effects on strength. A total of 189 experimental studies with 3459 participants were included. The median sample size was 15 participants, with an over-representation of men vs. women (79.4 vs. 20.6%). Studies on young participants and elders were scarce (4.2%). Most studies tested a single dose of caffeine (87.3%), while 72.0% used doses adjusted to body mass. Single-dose studies ranged from 1.7 to 7 mg/kg (4.8 ± 1.4 mg/kg), while dose-response studies ranged from 1 to 12 mg/kg. Caffeine was mixed with other substances in 27.0% of studies, although only 10.1% of studies analyzed the caffeine interaction with these substances. Capsules (51.9%) and beverages (41.3%) were the most common forms of caffeine administration. Similar proportions of studies focused on upper (24.9%) or lower body strength 37.6% (37.6% both). Participants' daily intake of caffeine was reported in 68.3% of studies. Overall, the pattern in the study of caffeine's effects on strength performance has been carried out with experiments including 11-15 adults, using a single and moderate dose of caffeine adjusted to participants' body mass in the form of a capsule.
这篇综述旨在描述咖啡因对力量影响的研究特征的演变。共纳入了 189 项实验研究，涉及 3459 名参与者。中位数样本量为 15 名参与者，男性参与者人数明显多于女性（79.4%比 20.6%）。关于年轻人和老年人的研究很少（4.2%）。大多数研究测试了单一剂量的咖啡因（87.3%），而 72.0%的研究使用了根据体重调整的剂量。单剂量研究的咖啡因剂量范围为 1.7 至 7mg/kg（4.8±1.4mg/kg），而剂量反应研究的咖啡因剂量范围为 1 至 12mg/kg。在 27.0%的研究中，咖啡因与其他物质混合，但只有 10.1%的研究分析了咖啡因与这些物质的相互作用。胶囊（51.9%）和饮料（41.3%）是最常见的咖啡因给药形式。同样比例的研究侧重于上半身（24.9%）或下半身力量（37.6%）。在 68.3%的研究中报告了参与者的咖啡因日摄入量。总体而言，咖啡因对力量表现影响的研究模式是在包括 11-15 名成年人的实验中进行的，使用了单一的、适度的、根据参与者体重调整的咖啡因剂量，以胶囊的形式给药。
