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Related Concept Videos

Obesity01:24

Obesity

The Body Mass Index (BMI) is a numerical value derived from a person's weight and height, used to categorize individuals into weight ranges. It is calculated using the formula: weight in kilograms divided by height in meters squared. Obesity is a health condition characterized by excessive accumulation of adipose tissue that poses health risks, often diagnosed with a BMI ≥ 30. This excess fat storage occurs when surplus dietary calories are converted into triglycerides and stored in adipocytes...
Pharmacokinetics in Obese Patients: Drug Metabolism and Excretion01:20

Pharmacokinetics in Obese Patients: Drug Metabolism and Excretion

Drug metabolism, a critical process in the liver, involves two primary phases: Phase I reactions and Phase II conjugation. Obesity introduces significant alterations in this metabolic process, primarily due to fatty infiltration of the liver, leading to conditions such as nonalcoholic fatty liver disease (NAFLD). This condition can modify the activities of both Phase I and II enzymes, impacting how drugs are metabolized in obese patients.Phase I metabolism sees variable effects across...
Pharmacokinetics in Obese Patients: Drug Absorption and Distribution01:25

Pharmacokinetics in Obese Patients: Drug Absorption and Distribution

Obesity significantly alters the pharmacokinetic processes of drug absorption and distribution, presenting unique challenges in medical treatment. The increased fat tissue and decreased lean muscle in obese individuals can significantly affect how drugs are absorbed into the body and distributed across different tissues. This alteration can lead to variances in the effectiveness and safety of medications, necessitating adjustments in dosing or drug selection for obese patients.One notable...
Drug Dosing: Obese Patients01:21

Drug Dosing: Obese Patients

In the United States, obesity is a prominent concern. It is linked to heightened mortality rates due to increased occurrences of conditions such as hypertension, atherosclerosis, coronary artery disease, and diabetes compared to nonobese individuals. A patient is classified as obese if their actual body weight surpasses the ideal or desirable body weight by 20%, based on Metropolitan Life Insurance Company data. Ideal body weights consider average weights and heights for males and females...
Type II Diabetes I: Introduction01:26

Type II Diabetes I: Introduction

Type 2 diabetes mellitus (T2DM) is a chronic metabolic disorder characterized by insulin resistance, in which target tissues such as the liver, muscle, and adipose tissue respond poorly to insulin. It is also associated with inadequate compensatory insulin secretion, where pancreatic β-cells fail to produce sufficient insulin. Together, these abnormalities lead to persistent hyperglycemia.EtiologyT2DM develops through a complex interaction of genetic predisposition and environmental or...
Bulimia Nervosa01:30

Bulimia Nervosa

Bulimia nervosa is a complex and severe eating disorder characterized by a cyclical pattern of binge-and-purge eating pattern. It generally involves an episode of binge eating, followed by compensatory behaviors such as vomiting, excessive exercise, laxative use, or fasting, to prevent weight gain. Despite often maintaining a normal weight, individuals with bulimia are intensely preoccupied with their body image and harbor an overwhelming fear of gaining weight. This can contribute to the...

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Related Experiment Video

Updated: May 10, 2026

A Chronic High-Intensity Interval Training and Diet-Induced Obesity Model to Maximize Exercise Effort and Induce Physiologic Changes in Rats
06:28

A Chronic High-Intensity Interval Training and Diet-Induced Obesity Model to Maximize Exercise Effort and Induce Physiologic Changes in Rats

Published on: April 28, 2023

Environmental perturbations: Obesity.

Stephanie A Shore1

  • 1Dept. of Env. Health, Harvard School of Public Health, USA. sshore@hsph.harvard.edu

Comprehensive Physiology
|June 6, 2013
PubMed
Summary
This summary is machine-generated.

Obesity significantly impacts respiratory mechanics, reducing lung volumes like functional residual capacity (FRC) and expiratory reserve volume (ERV). Weight loss is recommended to improve these obesity-related respiratory issues.

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Segmentation and Measurement of Fat Volumes in Murine Obesity Models Using X-ray Computed Tomography
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Segmentation and Measurement of Fat Volumes in Murine Obesity Models Using X-ray Computed Tomography

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Intraperitoneal Glucose Tolerance Test, Measurement of Lung Function, and Fixation of the Lung to Study the Impact of Obesity and Impaired Metabolism on Pulmonary Outcomes
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Intraperitoneal Glucose Tolerance Test, Measurement of Lung Function, and Fixation of the Lung to Study the Impact of Obesity and Impaired Metabolism on Pulmonary Outcomes

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Last Updated: May 10, 2026

A Chronic High-Intensity Interval Training and Diet-Induced Obesity Model to Maximize Exercise Effort and Induce Physiologic Changes in Rats
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Segmentation and Measurement of Fat Volumes in Murine Obesity Models Using X-ray Computed Tomography
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Segmentation and Measurement of Fat Volumes in Murine Obesity Models Using X-ray Computed Tomography

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Intraperitoneal Glucose Tolerance Test, Measurement of Lung Function, and Fixation of the Lung to Study the Impact of Obesity and Impaired Metabolism on Pulmonary Outcomes
08:30

Intraperitoneal Glucose Tolerance Test, Measurement of Lung Function, and Fixation of the Lung to Study the Impact of Obesity and Impaired Metabolism on Pulmonary Outcomes

Published on: March 15, 2018

Area of Science:

  • Pulmonary Medicine
  • Obesity Medicine

Background:

  • Obesity affects one-third of the U.S. population, with its impact on cardiovascular and metabolic diseases well-established.
  • The respiratory consequences of obesity are less understood but significant.

Purpose of the Study:

  • To review the effects of obesity on the respiratory system.
  • To highlight the mechanisms behind respiratory complications in obesity.

Main Methods:

  • Review of existing literature on obesity and respiratory function.
  • Analysis of how adipose tissue distribution affects respiratory mechanics.

Main Results:

  • Obesity alters respiratory system mechanics, reducing functional residual capacity (FRC) and expiratory reserve volume (ERV).
  • Adipose tissue location, not just mass, influences FRC and ERV.
  • Obesity causes airflow obstruction, promotes airway hyperresponsiveness, and is linked to asthma.
  • Hypoxemia in obesity is common, correlating with FRC and abdominal obesity, primarily due to ventilation-perfusion mismatch.
  • Dyspnea is frequently reported, correlating with reduced lung volumes.

Conclusions:

  • Obesity leads to significant respiratory complications including reduced lung volumes, airflow obstruction, hypoxemia, and dyspnea.
  • Weight reduction can substantially improve these respiratory issues in symptomatic obese individuals.