Manjarrez-Montes de Oca Rafael, Farfán-González Fernando, Camarillo-Romero Socorro, Tlatempa-Sotelo Patricia, Francisco-Argüelles Carlos, Kormanowski Alexander, González-Gallego Javier, Alvear-Ordenes Ildefonso
Center for Research and Graduate Studies in Health Sciences, Universidad Autónoma del Estado de México, Toluca, México.
Nutr Hosp. 2013 Mar-Apr;28(2):391-9. doi: 10.3305/nh.2013.28.2.6314.
Taekwondo (TKD) is a combat sport, which has also been proposed as a fitness program, with a strong anaerobic component. Creatine (Cr) supplementation is used to improve both anaerobic exercise performance and body composition. Therefore, Cr supplementation could be beneficial in TKD.
To determine the effect of Cr supplementation (50 mg/kg body wt) on body composition, anaerobic power and blood chemistry in young male TKD practitioners.
Ten male TKD practitioners (age [20 ± 2 yr], height [1.69 ± 0.06 m], and mass [67 ± 9.8 kg]) participated in a placebo-controlled, double blind, crossover study. Body composition (DEXA), anaerobic power (Wingate Test), blood lactate and blood chemistry were measured before and after supplementation. Differences between data before and after supplementation were calculated for each treatment (Cr and Placebo) and were compared using the Wilcoxon signed-rank test.
Fat mass (kg) decreased after placebo (Mdn [IqR] = -0.75 [-1.44 to 0.03]) and increased following Cr intake (0.17 [-0.77 to 1.13] kg) (Z = 2.191, p < 0.028, r = 0.49). Serum triglyceride concentration (mg/mL) increased after Cr (45.00 [-7.50 to 75.00]) and decrease with placebo (-7.00 [-10.75 to 12.00]) (Z = 2.090, p < 0.037, r = 0.47). No changes were found in others parameters.
Cr supplementation may increase fat mass and serum triglycerides concentration in young male TKD practitioners without improvement in anaerobic power. Cr supplementation appears to be safe, but athletes should be careful when they want to loss fat.
跆拳道是一项格斗运动，也被视为一种健身项目，具有很强的无氧运动成分。补充肌酸可提高无氧运动表现和身体成分。因此，补充肌酸可能对跆拳道运动有益。
确定补充肌酸（50毫克/千克体重）对年轻男性跆拳道练习者身体成分、无氧功率和血液生化指标的影响。
10名男性跆拳道练习者（年龄[20±2岁]，身高[1.69±0.06米]，体重[67±9.8千克]）参与了一项安慰剂对照、双盲、交叉研究。在补充前后测量身体成分（双能X线吸收法）、无氧功率（温盖特测试）、血乳酸和血液生化指标。计算每种处理（肌酸和安慰剂）补充前后数据的差异，并使用威尔科克森符号秩检验进行比较。
服用安慰剂后脂肪量（千克）减少（中位数[四分位距]=-0.75[-1.44至0.03]），摄入肌酸后增加（0.17[-0.77至1.13]千克）（Z=2.191，p<0.028，r=0.49）。补充肌酸后血清甘油三酯浓度（毫克/毫升）升高（45.00[-7.50至75.00]），服用安慰剂后降低（-7.00[-10.75至12.00]）（Z=2.090，p<0.037，r=0.47）。其他参数未发现变化。
补充肌酸可能会增加年轻男性跆拳道练习者的脂肪量和血清甘油三酯浓度，而无氧功率并未提高。补充肌酸似乎是安全的，但运动员在想要减脂时应谨慎。
