习惯性咖啡因消费和训练状态会影响急性咖啡因摄入量对运动表现的影响
Davar Khodadadi1, Farhad Azimi2, Abdorreza Eghbal Moghanlou3
1Faculty of Physical Education and Sports Sciences, Islamic Azad University Central Tehran Branch, Tehran, Iran.
Sports health
|February 5, 2025
概括
咖啡因可以提高运动表现,但习惯和训练会降低其效果. 在训练有素的个体中,短期停用咖啡因或增加剂量可以恢复表现的好处.
科学领域:
- 运动生理学 运动生理学
- 营养科学 营养科学
- 运动医学 运动医学
背景情况:
- 众所周知,咖啡因可以提高运动表现.
- 咖啡因习惯和个人培训状况对其人体效应的影响仍然不清楚.
研究的目的:
- 调查习惯性咖啡因消费和训练状态如何影响咖啡因提高表现的效果.
- 为了确定是否咖啡因的戒断或增加剂量可以克服减少人体效应.
主要方法:
- 这是一项双盲,安慰剂控制的研究,涉及80名身体不活跃的男性,随机分为四组 (咖啡因,咖啡因+训练,安慰剂,安慰剂+训练).
- 参与者接受了高强度间歇训练,并在9周内接受咖啡因 (3毫克/千克或6毫克/千克) 或安慰剂.
- 通过在多个时间点进行3公里跑步和Wingate功率测试来评估性能.
主要成果:
- 咖啡因 (3 mg/kg) 在所有组中改善了运行时间和平均输出功率 (MPO),在训练有素的个体中效果更大.
- 习惯性咖啡因摄入减少了咖啡因的人体效能效应,这种效应在训练组中因咖啡因剂量较高而加剧.
- 短期的咖啡因戒断增强了咖啡因对训练有素和未训练有素参与者的跑步表现和MPO的人体效应.
结论:
- 咖啡因的习惯和训练状态可以调节咖啡因的人体效益.
- 像短期咖啡因戒断或在训练有素的个人中增加运动前咖啡因剂量等策略可能有助于抵消人体效能降低.
更多相关视频
07:26Conducting Maximal and Submaximal Endurance Exercise Testing to Measure Physiological and Biological Responses to Acute Exercise in Humans
Published on: October 17, 2018
20.1K
04:54Using a Combination of Indirect Calorimetry, Infrared Thermography, and Blood Glucose Levels to Measure Brown Adipose Tissue Thermogenesis in Humans
Published on: June 2, 2023
1.3K
相关概念视频
01:20Exercise and Cardiovascular Response
711
Exercise significantly impacts cardiovascular response, which is crucial for understanding patient health and designing effective treatment plans.
Light to moderate physical activity initiates a series of interconnected responses in the body. The heart rate modestly increases in anticipation of the workout, followed by widespread vasodilation as oxygen consumption by skeletal muscles increases. This results in decreased peripheral resistance, increased capillary blood flow, and accelerated...
Light to moderate physical activity initiates a series of interconnected responses in the body. The heart rate modestly increases in anticipation of the workout, followed by widespread vasodilation as oxygen consumption by skeletal muscles increases. This results in decreased peripheral resistance, increased capillary blood flow, and accelerated...
711
01:16Experimental Designs
11.1K
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...
11.1K
01:17Exercise and Cardiac Output
895
Regular physical activity is essential for maintaining cardiovascular health, with aerobic exercises being particularly effective. According to the American Heart Association, 150 minutes of moderate to intense aerobic exercise per week is recommended for a healthy heart. Aerobic activities may include brisk walking, running, bicycling, cross-country skiing, and swimming, ideally performed three to five times per week.
Sustained exercise increases the muscles' oxygen demand, which can be...
Sustained exercise increases the muscles' oxygen demand, which can be...
895
01:27Exercise and Muscle Performance
1.3K
Exercise induces a range of adaptations in muscle tissue, depending on the type and duration of activity. Such physical training can be broadly categorized into two types: endurance exercises and resistance exercises.
Endurance exercises
Endurance exercises involve running, swimming, or cycling, which require repetitive movements with low force output. When a person engages in endurance exercise, a few noticeable changes occur in their skeletal muscles. For instance, the number of capillaries...
Endurance exercises
Endurance exercises involve running, swimming, or cycling, which require repetitive movements with low force output. When a person engages in endurance exercise, a few noticeable changes occur in their skeletal muscles. For instance, the number of capillaries...
1.3K
01:28Adrenergic Agonists: Mixed-Action Agents
656
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...
656
01:15Chronopharmacokinetics: Circadian Rhythms and Influence on Drug Response
41
Circadian rhythms are cyclic changes that are crucial in plasma drug concentrations. Various standard circadian parameters, including core body temperature, heart rate, and other cardiovascular factors, directly impact disease states and the therapeutic response to drug therapy.
The time of drug administration is an important factor to consider, as it can influence the toxic dose of a drug. For example, a study conducted by Prins et al. in 1997 examined the effects of the timing of...
The time of drug administration is an important factor to consider, as it can influence the toxic dose of a drug. For example, a study conducted by Prins et al. in 1997 examined the effects of the timing of...
41