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Related Concept Videos

Exercise and Muscle Performance01:27

Exercise and Muscle Performance

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Exercise induces a range of adaptations in muscle tissue, depending on the type and duration of activity. Such physical training can be broadly categorized into two types: endurance exercises and resistance exercises.
Endurance exercises
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Introduction
Exercise stress testing, commonly known as a treadmill test, is a noninvasive procedure used to evaluate cardiovascular function and diagnose heart conditions.
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Exercise significantly impacts cardiovascular response, which is crucial for understanding patient health and designing effective treatment plans.
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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.
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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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Related Experiment Video

Updated: Nov 21, 2025

Improving Strength, Power, Muscle Aerobic Capacity, and Glucose Tolerance through Short-term Progressive Strength Training Among Elderly People
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Cell Fitness: More Than Push-Ups.

Adam James Ferrari1,2,3, Ronny Drapkin1,2,4, Rajan Gogna5

  • 1Penn Ovarian Cancer Research Center, Department of Obstetrics and Gynecology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA.

International Journal of Molecular Sciences
|January 12, 2021
PubMed
Summary

Cell competition eliminates less fit cells. Recent studies reveal molecular mechanisms including fitness fingerprints, oncogenic pathways like Hippo, and cell junction stability, offering new cancer therapeutic targets.

Keywords:
COL17A1TAZYAPagingcancercell competitioncell fitnesscell junctionepidermal stem cellsflower proteinhFWEhippo pathwayoncogenic pathwayoutcompete

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Area of Science:

  • Developmental Biology
  • Cell Biology
  • Cancer Research

Background:

  • Cell competition (CC) is a mechanism where fitter cells eliminate less fit neighbors.
  • CC, first described in Drosophila melanogaster, involves diverse molecular pathways.
  • Understanding CC is crucial for comprehending tissue homeostasis and disease development.

Purpose of the Study:

  • To review recent studies expanding the understanding of molecular features governing cell competition.
  • To focus on molecular fitness fingerprints, oncogenic pathways, and cell junction stability in CC.
  • To explore how CC mechanisms are hijacked in cancer progression and potential therapeutic strategies.

Main Methods:

  • Review of recent scientific literature on cell competition.
  • Analysis of molecular mechanisms including protein isoforms, transcription factors, and cell adhesion molecules.
  • Integration of findings related to cancer progression, diagnostics, and therapeutics.

Main Results:

  • A molecular fitness fingerprint mediated by flower (hFWE) protein isoforms determines competitive outcomes.
  • The Hippo pathway (YAP/TAZ) enhances peritumoral fitness, protecting against tumor progression.
  • COL17A1's role in hemidesmosome stability influences fitness competition and aging in epidermal stem cells.

Conclusions:

  • These molecular features highlight how cell competition can be co-opted to promote cancer growth.
  • Understanding these pathways provides insights into disease development and progression.
  • Identifying CC mechanisms offers potential for novel cancer diagnostics and therapeutics.