女性在不同的代谢挑战性刺激中具有更好的代谢灵活性
José Antonio Benítez-Muñoz1, Isabel Guisado-Cuadrado1, Miguel Ángel Rojo-Tirado1
1LFE Research Group, Department of Health and Human Performance, Faculty of Physical Activity and Sport Science (INEF), Universidad Politécnica de Madrid, Madrid, Spain.
概括
与男性相比,女性表现出更强的代谢灵活性,体现出在各种条件下运动时脂肪氧化能力 (FATox/FFM) 更强. 这种差异观察到不论运动强度或代谢挑战,如糖原耗尽和热量.
科学领域:
- 运动生理学 运动生理学
- 代谢健康 代谢健康
- 代谢中的性别差异
背景情况:
- 代谢灵活性对于适应运动期间不断变化的能量需求至关重要.
- 了解对运动代谢反应的性别差异对于个性化训练和健康策略至关重要.
- 以前的研究还没有完全阐明在代谢上具有挑战性的条件下性别特异的代谢灵活性.
研究的目的:
- 为了研究在控制条件下的增量运动期间代谢灵活性的性别差异.
- 评估糖原耗尽和热暴露如何影响性别之间的代谢灵活性.
- 为了比较男性和女性之间的基质利用 (脂肪和碳水化合物氧化) 和能量消耗.
主要方法:
- 11名男性和9名女性在循环人体计上进行了最大增量运动测试.
- 在三个条件下进行了测试:控制 (高碳水化合物饮食),糖原耗尽 (低碳水化合物饮食) 和热 (被动加热).
- 间接热量计估计了基质氧化 (FATox/FFM,CHox/FFM) 和能量消耗 (EE/FFM);乳酸也被测量.
主要成果:
- 在所有条件下,女性的脂肪氧化 (FATox/FFM) 显著增加,因为运动强度在所有条件下都增加 (p=0.006).
- 碳水化合物氧化 (CHox/FFM) 和乳酸度在相同的运动强度下,两性之间没有显著差异.
- 在各种运动强度和条件下,女性的总体能量消耗 (EE/FFM) 较高 (p=0.002).
结论:
- 雌性比雄性具有更大的代谢灵活性,主要是由于运动期间脂肪利用能力更高.
- 在女性中,这种增强的脂肪氧化在不同的运动强度和代谢压力下 (糖原耗尽,热量) 保持.
- 这些发现表明基质新陈代谢中的性别特异性适应会影响体力活动期间的能量消耗.
相关概念视频
Other Glycolytic Pathways
1
The pentose phosphate pathway (PPP) operates in parallel with glycolysis, facilitating the metabolism of both pentoses and glucose. This pathway consists of two distinct phases: the oxidative and non-oxidative phases. While it does not directly generate ATP, the intermediates formed during the process can integrate into glycolysis, contributing to cellular energy metabolism when required.Oxidative Phase: NADPH ProductionThe oxidative phase of the pentose phosphate pathway is primarily...
1
Metabolic Rate
287
The human body is a powerhouse of energy, with every cell performing numerous functions that require energy. This energy production and consumption is measured by the metabolic rate, which quantifies the total heat generated by all the body's chemical reactions and mechanical work. This measurement helps to determine the rate of kilocalorie (kcal) consumption needed to fuel all ongoing activities.
The Basal Metabolic Rate (BMR) measures the energy expended at rest.
Several factors influence...
The Basal Metabolic Rate (BMR) measures the energy expended at rest.
Several factors influence...
287
Overview of Lipid Metabolism
1.1K
Lipid metabolism is a crucial process in the human body that involves the synthesis and degradation of lipids. This process is essential for energy production, cell membrane formation, and hormone production, among other functions.
Lipolysis: The Breakdown of Lipids:
Lipolysis is the process of breaking down lipids, particularly triglycerides, into glycerol and fatty acids. This process typically occurs in the adipose tissue and is triggered by various hormones, including glucagon and...
Lipolysis: The Breakdown of Lipids:
Lipolysis is the process of breaking down lipids, particularly triglycerides, into glycerol and fatty acids. This process typically occurs in the adipose tissue and is triggered by various hormones, including glucagon and...
1.1K
Metabolic States of the Body: Fasting and Starvation
1.1K
During the initial hours of fasting, the body uses up its glycogen stores as an energy source. Once these glycogen reserves are depleted, the body begins breaking down stored triglycerides and structural proteins. During this stage, glycerol becomes a key substrate for gluconeogenesis, while free fatty acids undergo beta-oxidation to provide energy for tissues, such as skeletal muscle. In the fasting state, the body spares protein breakdown as much as possible to conserve muscle and structural...
1.1K
Regulation of Metabolism
9.3K
Cellular needs and conditions vary from cell to cell and change within individual cells over time. For example, the required enzymes and energetic demands of stomach cells are different from those of fat storage cells, skin cells, blood cells, and nerve cells. Furthermore, a digestive cell works much harder to process and break down nutrients during the time that closely follows a meal compared with many hours after a meal. As these cellular demands and conditions vary, so do the amounts and...
9.3K
Overview of Carbohydrate Metabolism
762
Carbohydrate metabolism is a fundamental biochemical process that ensures a constant supply of energy to living cells. The most important carbohydrate is glucose, which can be broken down via glycolysis to enter into the Krebs cycle and eventually lead to the production of ATP through oxidative phosphorylation.
Glucose transport into cells is facilitated by a family of transport proteins called GLUT (Glucose Transporters). GLUT4 is the primary glucose transporter for insulin-stimulated glucose...
Glucose transport into cells is facilitated by a family of transport proteins called GLUT (Glucose Transporters). GLUT4 is the primary glucose transporter for insulin-stimulated glucose...
762


