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首页> 外文期刊>Journal of the International Society of Sports Nutrition >The acute effects of thermogenic fitness drink formulas containing 140?mg and 100?mg of caffeine on energy expenditure and fat metabolism at rest and during exercise
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The acute effects of thermogenic fitness drink formulas containing 140?mg and 100?mg of caffeine on energy expenditure and fat metabolism at rest and during exercise

机译：在休息和运动期间，含有140μmγmg和100μmγmg咖啡因的热能健身饮料公式的急性作用

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BACKGROUND:Thermogenic fitness drink formulas (TFD) have been shown to increase energy expenditure and markers of lipid metabolism. The purpose of the current study was to compare TFD formulas containing different caffeine concentrations versus a placebo drink on energy expenditure and lipid metabolism at rest and during exercise.METHODS:Thirty-two recreationally active participants (22.9?±?0.7 y, 167.1?±?1.4?cm, 68.8?±?2.0?kg, 24.0?±?1.2% fat) who were regular caffeine consumers, participated in this randomized, double-blind, crossover design study. Participants reported to the laboratory on three occasions, each of which required consumption of either a TFD containing 140?mg or 100?mg of caffeine or a placebo. Baseline measurements of resting energy expenditure (REE) and resting fat oxidation (RFO) were assessed using indirect calorimetry as well as measurements of serum glycerol concentration. Measurements were repeated at 30, 60, 90?min post-ingestion. Following resting measures, participants completed a graded exercise test to determine maximal oxygen uptake (V?Osub2max/sub), maximal fat oxidation (MFO) and the exercise intensity that elicits MFO (Fatsubmax/sub), and total energy expenditure (EE).RESULTS:A significant interaction was shown for REE (p??0.01) and RFO (p??0.01). Area under the curve analysis showed an increased REE for the 140?mg compared to the 100?mg formula (p?=?0.02) and placebo (p??0.01) and an increased REE for the 100?mg formula compared to placebo (p?=?0.02). RFO significantly decreased for caffeinated formulas at 30?min post ingestion compared to placebo and baseline (p??0.01) and significantly increased for the 140?mg formula at 60?min post-ingestion (p?=?0.03). A main effect was shown for serum glycerol concentrations over time (p??0.01). No significant differences were shown for V?Osub2max/sub (p?=?0.12), Fatsubmax/sub (p?=?0.22), and MFO (p?=?0.05), and EE (p?=?0.08) across drinks.CONCLUSIONS:Our results suggest that TFD formulas containing 100 and 140?mg of caffeine are effective in increasing REE and that a 40?mg of caffeine difference between the tested formulas may impact REE and RFO in healthy individuals within 60?min of ingestion.
机译：背景：已显示热质健身饮料公式（TFD）增加脂质代谢的能量消耗和标记。目前的研究目的是将含有不同咖啡因浓度的TFD公式与安慰剂饮料与休息期间和运动期间的能量消耗和脂质代谢进行了比较。方法：三十二次娱乐活动参与者（22.9？±0.7 y，167.1？± ？1.4？cm，68.8？±2.0？kg，24.0？±1.2％脂肪）是常规咖啡因消费者，参与了这项随机，双盲，交叉设计研究。参与者在三次向实验室报告，每次都需要消耗含有140μg或100？mg咖啡因或安慰剂的TFD。使用间接量热法评估静息能量支出（REE）和静脂氧化（RFO）的基线测量，以及血清甘油浓度的测量。在摄入后30,60,90,90次重复测量。随后休息措施，参与者完成了分级运动测试以确定最大氧气吸收（V≤o 2max ），最大脂肪氧化（MFO）和引发MFO的运动强度（FAT MAX ）和总能源支出（EE）。结果：REE显示出显着的相互作用（P？<β01）和RFO（P？<0.01）。曲线分析下的面积显示，与100·mg公式（p？= 0.02）和安慰剂（p≤0.02）和安慰剂（p≤0.02）和100μlappers（p≤0.02）和增长的REE增加，与安慰剂相比增加（p？= 0.02）。与安慰剂和基线相比，含咖啡因公式的咖啡因公式的RFO显着降低（p？<β01），在摄入后60？mg的140×mg公式显着增加（p？= 0.03）。显示出血清甘油浓度随时间的主要效果（P？<β01）。对于v？O 2max （p？= 0.12），FAT max （p？= 0.22）和mfo（p？=？0.05）显示显着差异）和ee（p？= 0.08）穿过饮料。结论：我们的结果表明，含有100和140毫克咖啡因的TFD公式在增加的REE中有效，并且测试公式之间的40毫克咖啡因差异可能会影响在60？闵摄取的健康个人中的REE和RFO。

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