新型低剂量咖啡因产品对身体表现的影响
Andrew Thomas Hulton1, Isobel Staines1, Oscar Clark1
1Discipline of Nutrition, Exercise, Chronobiology and Sleep, University of Surrey, Guildford GU2 7XH, UK.
Nutrients
|March 14, 2026
概括
低剂量的咖啡因,特别是以袋子形式的咖啡因,可以通过减少感知到的炼来增强肌肉耐力,即使没有显著的性能改善. 对新的咖啡因输送方法的进一步研究是有必要的.
科学领域:
- 运动科学 运动科学 运动科学
- 人类表现的人类表现.
- 营养补充剂 营养补充剂
背景情况:
- 咖啡因是一种已知的人体营养助剂,可以延缓疲劳并提高表现.
- 建议的咖啡因剂量在3-6mg/kg体重 (BM) 之间,但较低的剂量 (<3mg/kg) 也可能是有效的.
- 像袋子和牙这样的新型咖啡因输送系统需要进一步研究它们的有效性.
研究的目的:
- 研究新型低剂量咖啡因产品 (袋子和口香糖) 对肌肉耐力,力量和功率的影响.
- 为了比较80毫克咖啡因袋和80毫克咖啡因口香糖与安慰剂的人体效应.
- 评估低剂量咖啡因对运动期间感知劳动力 (RPE) 评级的影响.
主要方法:
- 一个重复测量,交叉设计被用到19名参与者.
- 参与者服用了一袋咖啡因 (80毫克),咖啡因口香糖 (80毫克) 或对照口香糖 (0毫克).
- 肌肉耐力 (腿部压力,肩部压力以致疲劳),力量 (同度性大腿中部拉力) 和力量 (逆向运动跳跃) 被测试,与RPE一起.
主要成果:
- 在各种条件的物理性能测试中没有发现统计学上显著的差异.
- 与安慰剂和咖啡因口香糖相比,咖啡因袋对腿部压力和肩部压力耐力的影响大小表明中等到小.
- 与安慰剂相比,咖啡因袋在腿部按压期间报告了显著较低的RPE.
结论:
- 低剂量的咖啡因,特别是以袋子形式的咖啡因,显示出提高力量耐力的能力.
- 机能效应可能与咖啡因降低感知劳动力的能力有关.
- 新的咖啡因输送方法需要继续调查它们对运动表现和感知的影响.
相关概念视频
Experimental Designs
18.4K
An experimental design is a systematic process that allows researchers to evaluate the relationship between dependent and independent variables. There are three widely used types of experimental design - pre-experimental design, true experimental design, and quasi-experimental design. In pre-experimental design, the researcher compares the data before and after some interventions or treatments. The true-experimental design has more than one purposefully created group, a commonly measured...
18.4K
Stimulants
1.2K
Stimulants are substances that enhance neural activity and elevate dopamine levels in the brain, leading to their highly addictive nature. These drugs include cocaine, amphetamines, MDMA, caffeine, and nicotine, each with distinct mechanisms of action and varied health implications.
Cocaine can be administered via snorting, injection, or smoking. It primarily functions by blocking the reuptake of dopamine, resulting in a euphoric high characterized by an intense sensation of happiness and...
Cocaine can be administered via snorting, injection, or smoking. It primarily functions by blocking the reuptake of dopamine, resulting in a euphoric high characterized by an intense sensation of happiness and...
1.2K
Cognitive Enhancers: Cholinesterase Inhibitors and NMDA Receptor Antagonists
793
Cognitive enhancers, also known as "smart drugs," are substances used to enhance memory, mental alertness, and concentration. These can be natural or synthetic and improve cognition in conditions like Alzheimer's disease (AD) and other neurodegenerative diseases. Some common examples include caffeine, amphetamines, methylphenidate, modafinil, arecoline, donepezil, vortioxetine, and piracetam. These enhancers work on the principle of synaptic plasticity and altered circuit function.
793
Insufficient Sleep and Sleep Deprivation
1.2K
Insufficient sleep refers to not getting the recommended amount of sleep for optimal functioning, even if it's just slightly less than needed. Sleep insufficiency may occur due to lifestyle choices, such as staying up late for social events or work, resulting in routinely getting less sleep than required. For example, consistently sleeping 6 hours when the body needs 7-9 hours can lead to cumulative effects on health and well-being.
Sleep deprivation is a more severe form of sleep loss...
Sleep deprivation is a more severe form of sleep loss...
1.2K
Adrenergic Agonists: Indirect-Acting Agents
2.9K
Indirect-acting adrenergic agonists potentiate the effects of endogenous catecholamines through different mechanisms without directly binding to adrenoceptors.
One mechanism involves depleting stored catecholamines by displacing them from synaptic vesicles. These agents, known as "displacers," are transported into vesicles at the expense of noradrenaline. Examples include amphetamine and tyramine, which lack a catechol moiety, resulting in prolonged action, improved oral...
One mechanism involves depleting stored catecholamines by displacing them from synaptic vesicles. These agents, known as "displacers," are transported into vesicles at the expense of noradrenaline. Examples include amphetamine and tyramine, which lack a catechol moiety, resulting in prolonged action, improved oral...
2.9K
Adrenergic Agonists: Mixed-Action Agents
1.7K
Mixed-action adrenergic agonists, like ephedrine and pseudoephedrine, directly and indirectly affect adrenergic receptors. These agents stimulate adrenoceptors and indirectly release stored neurotransmitters, amplifying the adrenergic response.
Ephedrine and pseudoephedrine lack a catecholamine group, making them less susceptible to degradation by metabolic enzymes. They have increased oral bioavailability and lipophilicity, resulting in a longer duration of action. Their response is reduced by...
Ephedrine and pseudoephedrine lack a catecholamine group, making them less susceptible to degradation by metabolic enzymes. They have increased oral bioavailability and lipophilicity, resulting in a longer duration of action. Their response is reduced by...
1.7K


