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相关概念视频

Exercise and Cardiac Output01:17

Exercise and Cardiac Output

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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...
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Metabolic Rate01:25

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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...
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Drug Dosing: Geriatric Patients01:15

Drug Dosing: Geriatric Patients

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Elderly individuals encompass a diverse population with varying degrees of age-related physiological changes. Defining the elderly presents challenges, as the geriatric population is often arbitrarily categorized as individuals older than 65. However, many individuals in this group lead active and healthy lives, with an increasing number surpassing 85 years and falling into the older elderly category. Physiological changes associated with aging impact performance capacity and homeostatic...
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Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Metabolism01:18

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Geriatric patients show significant variation in how their bodies process medications, which can change how effective and safe treatments are. The liver is the primary organ where drug metabolism occurs, involving two main types of chemical reactions: phase I and II. Phase I metabolism is driven by the cytochrome P450 enzyme system, which includes key types such as CYP3A, CYP2D6, and CYP2C9. Research indicates that while aging doesn't notably alter the levels or activity of these enzymes, it...
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Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Excretion01:18

Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Excretion

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In geriatric patients, renal physiology undergoes significant changes, including diminished renal blood flow and a lower glomerular filtration rate (GFR), leading to alterations in medication clearance. Drugs such as aminoglycoside antibiotics, lithium, and digoxin, which rely on glomerular filtration for removal from the body, particularly impact pharmacokinetics. These drugs tend to have slower clearance rates in older adults, necessitating careful dosage considerations.Evaluation of renal...
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Age-related pharmacokinetic changes are extensively documented, but understanding age-related pharmacodynamic alterations is relatively limited. This knowledge gap can be partly attributed to the complexity of developing appropriate measures of drug responses compared to bioanalytical methods for determining drug concentrations.Most information regarding age-related differences in human pharmacodynamics originates from cross-sectional studies. However, these studies assume that observed mean...
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Visualization of Intensity Levels to Reduce the Gap Between Self-Reported and Directly Measured Physical Activity
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老年人的日常活动能耗和死亡率

Todd M Manini1, James E Everhart, Kushang V Patel

  • 1National Institute on Aging, Laboratory of Epidemiology, Demography and Biometry, Bethesda, Md 20892, USA. maninit@mail.nih.gov

JAMA
|July 13, 2006
PubMed
概括

通过日常活动消耗更多的能量与老年人死亡风险降低有关. 较高的自由生活活动能耗显著降低了死亡的可能性,无论结构化的运动.

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科学领域:

  • 老年学是指老年学的学科.
  • 公共卫生 公共卫生
  • 代谢科学 代谢科学

背景情况:

  • 众所周知,参与运动可以降低死亡率.
  • 然而,在自由生活环境中,一般日常能源消耗对生存的益处不太清楚.
  • 研究非运动活动热生成 (NEAT) 对于理解整体健康结果至关重要.

研究的目的:

  • 调查自由生活活动能源消耗与老年人全因死亡率之间的关联.
  • 为了确定仅仅通过任何活动消耗能量是否会赋予生存优势.

主要方法:

  • 302名健康的老年人 (70-82岁) 在2周内使用双标签水测量了他们的总能耗.
  • 自由生活活动的能量消耗是通过从总能量消耗中减去休息代谢率和饭菜的热效应来计算的.
  • 参与者被跟踪了平均6.15年,以追踪所有原因的死亡率.

主要成果:

  • 较高的每日自由生活活动能耗与所有原因死亡风险明显降低有关.
  • 能源消耗最高三分之一的人与最低三分之一的人相比,死亡风险降低了69% (HR,0.31).
  • 在调整了各种健康和生活方式因素后,这种关联仍然很重要.

结论:

  • 客观地衡量自由生活活动的能源消耗是健康老年人降低死亡风险的强有力的预测指标.
  • 研究结果表明,日常活动中任何形式的能源消耗都可能有助于增加寿命.
  • 除了结构化的运动之外,促进一般体育活动可能是老年人群的关键公共卫生战略.