Dirección de Investigación, Universidad Mayor Santiago de Chile; Universidad Santo Tomás, Talca. Chile. Carrera de Educación Física, Santiago de Chile, Chile.
Department of Physical Education, North University of Parana, Londrina, Brazil.
J Int Soc Sports Nutr. 2017 Feb 7;14:5. doi: 10.1186/s12970-017-0162-2. eCollection 2017.
To determine the effects of a low dose, short-term Creatine monohydrate (Cr) supplementation (0.03 g.kg.d during 14 d) on muscle power output in elite youth soccer players.
Using a two-group matched, double blind, placebo-controlled design, nineteen male soccer players (mean age = 17.0 ± 0.5 years) were randomly assigned to either Cr ( = 9) or placebo ( = 10) group. Before and after supplementation, participants performed a 30s Wingate Anaerobic Test (WAnT) to assess peak power output (PPO), mean power output (MPO), fatigue index (FI), and total work.
There were significant increases in both PPO and MPO after the Cr supplementation period ( ≤ 0.05) but not the placebo period. There were also significant increases in total work, but not FI, after the Cr supplementation and placebo periods ( ≤ 0.05). Notably, there were differences in total work between the Cr and placebo groups after ( ≤ 0.05) but not before the 14 d supplementation period.
There is substantial evidence to indicate that a low-dose, short-term oral Cr supplementation beneficially affected muscle power output in elite youth soccer players.
为了确定短期小剂量肌酸（Cr）补充（14 天期间每天 0.03g/kg.d）对精英青年足球运动员肌肉力量输出的影响。
采用两组成对、双盲、安慰剂对照设计，将 19 名男性足球运动员（平均年龄 = 17.0 ± 0.5 岁）随机分为 Cr（ = 9）或安慰剂（ = 10）组。在补充前后，参与者进行 30s 无氧 Wingate 测试（WAnT），以评估峰值功率输出（PPO）、平均功率输出（MPO）、疲劳指数（FI）和总功。
Cr 补充期后 PPO 和 MPO 均显著增加（ ≤ 0.05），但安慰剂期无显著增加。Cr 补充期和安慰剂期后总功均显著增加，但 FI 无显著增加（ ≤ 0.05）。值得注意的是，Cr 和安慰剂组在补充 14 天后的总功存在差异（ ≤ 0.05），但在补充前无差异。
有充分证据表明，短期小剂量口服 Cr 补充对精英青年足球运动员的肌肉力量输出有有益影响。
