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INT SOC SPORT NUTR:运动前半小时喝一杯浓咖啡会增加脂肪燃烧

2021-03-24 MedSci原创 MedSci原创

咖啡和茶是世界上最受欢迎的饮料之一。因其含有大量的咖啡因,常被人们饮用以醒神和提高工作效率。

咖啡和茶是世界上最受欢迎的饮料之一。因其含有大量的咖啡因,常被人们饮用以醒神和提高工作效率。有研究显示,咖啡因可增加最大脂肪氧化率(MFO)和有氧运动能力。那么,咖啡因是否有助于减缓运动过程中全身脂肪氧化速率和增加耐力表现?

近日,发表在 Journal of the International Society of Sports Nutrition杂志上的一项研究显示,在进行有氧运动前半小时摄入咖啡因(约3毫克/千克,相当于一杯浓咖啡),能显著提高脂肪燃烧的速度。若在下午进行运动,咖啡因的效果比上午更明显。

在这项研究中,研究人员对平均年龄为32岁的15名男性进行研究,所有受试者必须符合以下纳入标准:(i)体重指数为18.5–28 kg / m 2ii)不吸烟(iii)没有遭受可能因体育锻炼而加剧的疾病,(iv)不服用任何药物或药物(v)是天真的咖啡因消费者(<50毫克/天)(vi)曾经有耐力训练的经验(即自我报告至少2年的耐力训练,包括每周3次或以上训练课程[3.6±0.2/])(vii)没有任何咖啡因过敏( viii)上个月未发生肌肉骨骼损伤。

受试者每隔7天完成4次运动测试,早上8点和下午5点摄入3毫克/千克的咖啡因或安慰剂(每个受试者以随机顺序完成四个条件下的测试)。每次运动测试前的条件都是严格标准化的,通过间接量热法测量MFO和最大摄氧量(VO 2max),并计算出最大运动强度(Fat max)。

结果显示,在进行有氧运动测试前30分钟摄入咖啡因,无论一天中的什么时间,都会增加运动过程中的最大脂肪氧化量,且在运动过程中脂肪氧化存在昼夜变化。下午运动前摄入咖啡因的MFOFatmaxVO2max显著高于上午(均P0.05)。与安慰剂相比,咖啡因使上午的平均MFO增加了10.7%(分别为0.28 ± 0.10 vs. 0.31 ± 0.09 g/minP <0.001),下午的平均MFO增加了29.0%0.31 ± 0.09 vs. 0.40 ± 0.10 g/minP <0.001)。咖啡因还使上午的平均Fatmax增加了11.1%36.9±14.4[安慰剂]vs.41.0±13.1%P = 0.005),下午增加了13.1%42.0±11.6vs.47.5±10.8%P = 0.008)。

另外,有研究建议,早上空腹锻炼以增加脂肪氧化是很平常的事。但是,该建议可能缺乏科学依据。该研究结果提示,在空腹时间相同的情况下,下午最大脂肪氧化量高于上午。

综上所述,咖啡因摄入和下午进行中等强度的有氧运动相结合,为人们在体育锻炼中寻求增加脂肪燃烧提供了最佳方案。

原始出处

Mauricio Ramírez-Maldonado et al, Caffeine increases maximal fat oxidation during a graded exercise test: is there a diurnal variation?, Journal of the International Society of Sports Nutrition (2021). DOI: 10.1186/s12970-020-00400-6

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    2021-03-24 小姓王

    哪类咖啡呢

    0

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    2021-03-24 145cc5f1m65暂无昵称

    马上就去喝咖啡

    0

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    2021-03-24 千奇百怪的漫长旅行

    学到了,喝完咖啡去运动!

    0

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