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Related Concept Videos

Fatigue01:21

Fatigue

279
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...
279
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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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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Myocarditis II: Clinical Features and Diagnostic Tests01:27

Myocarditis II: Clinical Features and Diagnostic Tests

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Myocarditis is an inflammation of the heart muscle. The symptoms vary widely, encompassing asymptomatic presentations to severe, acute manifestations.Clinical PresentationAsymptomatic cases: In some instances, myocarditis may be asymptomatic, with the infection resolving without intervention. These cases often go undetected unless discovered incidentally through diagnostic imaging or tests conducted for other reasons.General Early Symptoms: Early symptoms of myocarditis are non-specific and can...
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Long-term Depression01:03

Long-term Depression

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Long-term depression, or LTD, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTD is the process of synaptic weakening that occurs over time between pre and postsynaptic neuronal connections. The synaptic weakening of LTD works in opposition to synaptic strengthening by long-term potentiation (LTP) and together are the main mechanisms that underlie learning and memory.
Calcium Ion Concentration Mechanism
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Heart Failure III: Clinical Manifestations01:26

Heart Failure III: Clinical Manifestations

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Heart failure (HF) manifests primarily as dyspnea, fatigue, and fluid retention, resulting in peripheral and pulmonary edema. Symptoms may vary depending on which ventricle is more affected, left or right.Left-Sided Heart FailureAlso known as left ventricular failure, this condition results from the left ventricle's inability to fill or eject sufficient blood into the systemic circulation. It leads to pulmonary congestion, which occurs when the left ventricle fails to eject blood effectively...
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Related Experiment Video

Updated: Oct 11, 2025

Acupoint Application as a Traditional Chinese Medicine Treatment for Fatigue Associated with Chronic Obstructive Pulmonary Disease
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[Fatigue at Long COVID].

Anna-Lena Weingärtner, Andreas Stengel

    Psychotherapie, Psychosomatik, Medizinische Psychologie
    |December 6, 2021
    PubMed
    Summary
    This summary is machine-generated.

    Long COVID, characterized by persistent symptoms post-SARS-CoV-2 infection, frequently includes debilitating fatigue. This article classifies Long COVID fatigue causes and proposes targeted treatments for improved patient outcomes.

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    Area of Science:

    • Infectious Diseases
    • Neurology
    • Immunology

    Background:

    • Long COVID, a post-SARS-CoV-2 syndrome, presents with diverse persistent symptoms.
    • Fatigue is the most prevalent and impactful symptom reported by Long COVID patients.
    • Understanding the underlying mechanisms of fatigue is crucial for effective management.

    Purpose of the Study:

    • To classify the pathogenetic mechanisms contributing to fatigue in Long COVID.
    • To propose evidence-based treatment strategies tailored to different fatigue classifications.
    • To enhance the clinical approach to managing Long COVID-related fatigue.

    Main Methods:

    • Review and synthesis of current literature on Long COVID pathophysiology.
    • Categorization of fatigue based on proposed pathogenetic pathways (e.g., viral persistence, immune dysregulation, neurological dysfunction).
    • Analysis of existing treatment options and their potential efficacy for specific fatigue subtypes.

    Main Results:

    • Fatigue in Long COVID can stem from multiple interconnected factors, including chronic inflammation, autonomic dysfunction, and metabolic disturbances.
    • A proposed classification identifies distinct profiles of Long COVID fatigue.
    • Preliminary evidence suggests differential responses to treatments based on the pathogenetic subtype.

    Conclusions:

    • Long COVID fatigue is a complex multifactorial condition requiring personalized treatment approaches.
    • Pathogenetic classification offers a framework for guiding therapeutic interventions.
    • Further research is needed to validate treatment strategies for specific Long COVID fatigue subtypes.