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Related Concept Videos

Fatigue01:21

Fatigue

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Fatigue occurs when materials rupture under repeated or fluctuating loads, even at stress levels far below their static breaking strength. It typically results in brittle failure, even for ductile materials. It is a critical consideration in designing machines and structural components subjected to repetitive or varying loads. The nature of these loadings can range from fluctuating loads like unbalanced pump impellers causing vibrations to repeatedly bending a thin steel rod wire back and forth...
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Muscle Recovery and Fatigue01:24

Muscle Recovery and Fatigue

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Muscle fatigue refers to the decline in a muscle's ability to maintain the force of contraction after prolonged activity. It primarily stems from changes within muscle fibers. Even before experiencing muscle fatigue, one may feel tired and have the urge to stop the activity. This response, known as central fatigue, occurs due to changes in the central nervous system, namely the brain and spinal cord. While there is no single mechanism that induces fatigue, it may serve as a protective...
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Desensitization and Tachyphylaxis01:20

Desensitization and Tachyphylaxis

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Tachyphylaxis is described as a rapid decrease in response to a drug after repeated or continuous administration of the same drug dose. It is a phenomenon where the body becomes less responsive to a particular substance or intervention over time, requiring higher doses or stronger interventions to achieve the same effect. It results from adaptive changes in the body's receptors, signaling pathways, or physiological processes that occur in response to prolonged exposure to a stimulus.
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Fatigue Strength of Concrete01:22

Fatigue Strength of Concrete

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Fatigue, in the context of materials science and engineering, refers to the weakening or failure of a material caused by repeatedly applied loads, even if these loads are below the strength limit of the material. Fatigue strength in concrete is a critical property that influences its durability and longevity. Concrete can fail in two ways due to fatigue. Static fatigue or creep rupture occurs under a constant load or one that increases slowly. The other failure mode is due to cyclical or...
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Stress: General Loading Conditions01:15

Stress: General Loading Conditions

449
To grasp the intricacy of real-world conditions where multiple loads are applied simultaneously to a structure, one might visualize a section passing through a specific point within a body, aligned parallel to the xy plane. This section is subjected to various forces, including original loads, normal forces, and shearing forces.
The shearing force, possessing potential directionality within the plane of the section, is simplified into two component forces running parallel to the x and y axes....
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Methods of Documentation II: POMR01:26

Methods of Documentation II: POMR

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The Problem-Oriented Medical Record (POMR) revolutionized medical record-keeping by introducing a systematic approach focusing on the patient's problems rather than merely listing symptoms. Dr. Lawrence Weed's introduction of this method in the 1960s marked a significant advancement in medical documentation. The POMR framework consists of four key components: the database, problem list, plan of care, and progress notes.
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Related Experiment Video

Updated: Nov 20, 2025

The Treadmill Fatigue Test: A Simple, High-throughput Assay of Fatigue-like Behavior for the Mouse
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Mask fatigue.

Sanjay Kalra1, Sandeep Chaudhary2, Viny Kantroo3

  • 1Department of Endocrinology, Bharti Hospital, Karnal, India.

JPMA. the Journal of the Pakistan Medical Association
|January 21, 2021
PubMed
Summary
This summary is machine-generated.

Prolonged mask use can cause mask fatigue, a feeling of low energy. This article discusses mask fatigue and offers practical strategies for its reduction in daily life.

Keywords:
COVID 19, hypoxia, mask, N 95, fatigue, CO2 retention

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Area of Science:

  • Public Health
  • Occupational Health

Background:

  • Extended mask-wearing is now common due to public health measures.
  • This has led to the phenomenon known as 'mask fatigue'.

Purpose of the Study:

  • To define mask fatigue.
  • To discuss its various aspects.
  • To provide practical tips for reducing mask fatigue.

Main Methods:

  • This communication is a descriptive review.
  • It synthesizes information on mask fatigue.

Main Results:

  • Mask fatigue is characterized by a lack of energy following prolonged mask use.
  • Several pragmatic tips are provided for its mitigation.

Conclusions:

  • Mask fatigue is a recognized issue associated with extended mask use.
  • Understanding and managing mask fatigue is important for healthcare professionals and the general public.