Green J M, McLester J R, Smith J E, Mansfield E R
Dept of Physical Education and Recreation, Western Kentucky University, Bowling Green 42101, USA.
J Strength Cond Res. 2001 Feb;15(1):36-41.
Nineteen physically active men supplemented their diet with 20 g per day creatine monohydrate (Cr group) or placebo (PI group) for 6 days. Before and after supplementation, subjects performed 3 arm Wingates (AW1, AW2, and AW3) and 3 leg Wingates (LW1, LW2, and LW3) on consecutive days. Wingates were separated by 2 minutes each. Mean power (MP), peak power (PP), and percent decrease (%D) were compared between and within groups. MP did not change significantly for arms or legs. PP did not change significantly for legs. PP increased significantly in the Cr group (AW1) and for the P1 group (AW1 and AW3). MP and PP were not significantly different between groups. The %D increased significantly in the P1 group (AW1, AW3, and LW3). For the Cr group, %D decreased significantly (pre vs. post) and was significantly lower than for the P1 group (LW2-post). Results suggest that short-term Cr supplementation does not enhance MP and PP during repeated upper- and lower-body Wingate tests when not accompanied by an increase in body weight. However, changes in %D suggest possible ergogenic effects.
19名体力活动较多的男性连续6天每天在饮食中补充20克一水肌酸（Cr组）或安慰剂（PI组）。在补充前后，受试者连续几天进行3次上肢温盖特测试（AW1、AW2和AW3）和3次下肢温盖特测试（LW1、LW2和LW3）。每次温盖特测试间隔2分钟。比较了组间和组内的平均功率（MP）、峰值功率（PP）和功率下降百分比（%D）。上肢或下肢的MP没有显著变化。下肢的PP没有显著变化。Cr组（AW1）和P1组（AW1和AW3）的PP显著增加。组间的MP和PP没有显著差异。P1组（AW1、AW3和LW3）的%D显著增加。对于Cr组，%D显著降低（补充前与补充后），且显著低于P1组（LW2-补充后）。结果表明，在不伴有体重增加的情况下，短期补充肌酸在重复的上、下肢温盖特测试中不会提高MP和PP。然而，%D的变化表明可能存在促力效应。
