联合训练前摄入左旋肉碱对超重年轻成年女性身体组成和健康相关生理因素的影响

Jeong-Heon Oh, Tae-Beom Seo
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摘要

本研究的目的是探讨在有氧和阻力联合运动前补充左旋肉碱对身体成分、身体健康和代谢危险因素的影响。这项研究的对象是18名没有运动经验的超重年轻成年女性,她们被随机分为两组;联合训练+安慰剂摄入组(PLA, n=9)和联合训练+左旋肉碱摄入组(CAR, n=9)。有氧运动和阻力运动组成的联合训练每周进行3次,持续8周。为考察效果,对联合训练前和训练后8周的身体组成、握力、背部力量、力量、肌肉耐力、心肺耐力、血压、空腹血糖、血脂浓度、腰臀比进行分析。采用双向重复方差分析确定组间、期间差异显著。综上所述,口服2g左旋肉碱补充剂结合训练,显著降低体脂百分比,显著增加无脂质量,但对体质和代谢危险因素没有影响。因此,我们的研究结果提供了科学证据,表明摄入左旋肉碱和联合训练可以作为一种增能补充剂来改善超重年轻成年女性的身体成分。
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Effect of L-carnitine intake before combined training on body composition and health-related physiological factors in overweight young-adult women
The purpose of this study was to investigate the effect of L-carnitine supplement intake before combined aerobic and resistance exercises on body composition, physical fitness, and metabolic risk factors. The subjects of this study were 18 overweight young-adult women with no exercise experience, and they were randomly divided into two groups; combined training+placebo intake group(PLA, n=9), and combined training+L-carnitine intake group(CAR, n=9). Combined training which consists of aerobic and resistance exercises was performed 3 times a week for 8 weeks. To investigate the effect, body composition, grip strength, back strength, power, muscular endurance, cardiopulmonary endurance, blood pressure, fasting blood glucose, blood lipid concentration, and waist-hip ratio were analyzed before and 8 weeks after combined training. Significant differences between group and period were determined with two-way repeated ANOVA. To summarize the results of this study, the oral intake of 2g of L-carnitine supplement with combined training significantly decreased percent body fat and significantly increased fat-free mass, but did not effect on physical fitness and metabolic risk factors. Therefore, our findings suggest scientific evidence that L-carnitine intake and combined training might be used as an ergogenic supplement to improve body composition in overweight young-adult women.
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