相关实验视频
Updated: May 1, 2026

10:49
Power Input Measurements in Stirred Bioreactors at Laboratory Scale
Published on: May 16, 2018
20.2K
在德国,整个生命周期的循环人体力学的乳酸值2功率的参考标准
Janis Fiedler1, Maximiliane Thron1, Stefan Altmann1,2
1Institute of Sports and Sports Science, Institute of Sports and Sports Science, Karlsruhe, Germany.
Journal of sports sciences
|June 19, 2025
概括
这项研究确定了德国乳酸值对心肺呼吸能力的参考值. 这些发现为评估不同年龄组的表现提供了关键的标准.
科学领域:
- 运动生理学 运动生理学
- 运动医学 运动医学
- 公共卫生 公共卫生
背景情况:
- 心血管健康是一个关键的健康指标.
- 没有确定的乳酸值的性能参考值.
- 乳酸值是运动强度和健身的重要标志物.
研究的目的:
- 建立循环人体表仪在固定和个人乳酸值2概念的性能参考标准.
- 提供德国心肺呼吸能力的特定年龄和性别的参考值.
- 填补现有文献中关于乳酸值性能数据的空白.
主要方法:
- 来自德国两项全国性研究 (KiGGS第2波和DEGS1) 的数据汇总.
- 包括2389名女性和2801名14-64岁的男性参与者.
- 利用定位,尺度和形状 (GAMLSS) 的通用添加模型来计算固定 (LT2fix) 和个人 (LT2ind) 乳酸值的绝对和相对功率的参考值.
主要成果:
- 与固定乳酸值2 (LT2fix) 相比,个体乳酸值2 (LT2ind) 在较低的输出功率下达到.
- 相对力量在14岁时达到顶峰,在20岁时下降,然后在64岁时慢慢下降.
- 绝对功率在45岁之前保持稳定,然后逐渐下降.
结论:
- 该研究提出了德国青少年和成人乳酸值表现的首个参考值.
- 这些参考值可用于估计心肺呼吸能力.
- 这些发现有助于更好地了解与年龄相关的运动表现变化.
相关概念视频
Calculating Standard Free Energy Changes
20.7K
The free energy change for a reaction that occurs under the standard conditions of 1 bar pressure and at 298 K is called the standard free energy change. Since free energy is a state function, its value depends only on the conditions of the initial and final states of the system. A convenient and common approach to the calculation of free energy changes for physical and chemical reactions is by use of widely available compilations of standard state thermodynamic data. One method involves the...
20.7K
The Nernst Equation
34.2K
Nonstandard Reaction Conditions
The interconnection between standard cell potentials and various thermodynamic parameters such as the standard free energy change ΔG° and equilibrium constant K has been previously explored. For example, a redox reaction involving zinc(II) and tin(II) ions at 1 M concentration with Eºcell = +0.291 V and ΔG° = −56.2 kJ is spontaneous.
The interconnection between standard cell potentials and various thermodynamic parameters such as the standard free energy change ΔG° and equilibrium constant K has been previously explored. For example, a redox reaction involving zinc(II) and tin(II) ions at 1 M concentration with Eºcell = +0.291 V and ΔG° = −56.2 kJ is spontaneous.
34.2K
Biological Effects of Radiation
15.4K
All radioactive nuclides emit high-energy particles or electromagnetic waves. When this radiation encounters living cells, it can cause heating, break chemical bonds, or ionize molecules. The most serious biological damage results when these radioactive emissions fragment or ionize molecules. For example, α and β particles emitted from nuclear decay reactions possess much higher energies than ordinary chemical bond energies. When these particles strike and penetrate matter, they...
15.4K
pH Homeostasis
12.2K
Acid-base homeostasis is essential for maintaining normal physiological activities in humans. The pH of various body fluids is strictly regulated because it is critical for the optimal activity of enzymes involved in metabolic reactions. Enzymes are basically proteins, so, any significant change in pH can affect their structure and activity. In humans, pH is regulated using three primary mechanisms— chemical buffer systems, respiratory regulation, and renal regulation.
Respiratory...
Respiratory...
12.2K
Applications of EMF Measurements
121
Electromotive force (EMF) measurements have a broad range of applications in various fields, including chemistry and physics. The electrochemical series, an arrangement of elements in order of their standard electrode potentials, can be determined through EMF measurements. Elements with lower standard potentials can reduce ions of elements with higher standard potentials.The standard cell potential, E°, allows for the calculation of the standard reaction Gibbs energy, ΔG°, and...
121
Metabolic Rate
1.5K
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...
1.5K

