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Cited by 457Exercise and Physiological ResponsesMuscle Physiology and DisordersMuscle and Compartmental Disorders

The DOI matches its Crossref record.

Initial events in exercise-induced muscular injury

BEN KIBLER, CHAIRPERSON W., ARMSTRONG, R. B.·1990·Medicine & Science in Sports & Exercise
DOI 10.1249/00005768-199008000-00002
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Abstract

Immediately following unaccustomed exercise, particularly that with eccentric contractions, there is evidence of injury to skeletal muscle fibers: a) disruption of the normal myofilament structures in some sarcomeres, observable with both light and electron microscope and b) loss of intramuscular proteins (e.g., creatine kinase enzymes) into the plasma, indicating damage to sarcolemma. This pathology is probably responsible for the temporary reductions in muscle force and delayed-onset soreness that can occur following eccentric exercise. The mechanisms underlying this injury are not known, although loss of intracellular Ca2+ homeostasis could play a primary role. In other experimental muscle injury models, elevated [Ca2+]i appears to cause release of muscle enzymes through activation of phospholipase A2, which in turn could induce injury to sarcolemma through production of leukotrienes and prostaglandins, through free O2 radical formation (in the subsequent lipoxygenase and cyclooxygenase reactions), and/or through release of detergent lysophospholipids. On the other hand, the mechanism responsible for the rapid damage to myofibrils caused by increased [Ca2+]i is unknown. Regardless of the cause(s), the initial and early events in the injury process are autogenetic; i.e., they are indigenous to the muscle cells and occur before phagocytic cells enter the injury site.

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Metadata

Authors
BEN KIBLER, C. W., & ARMSTRONG, R. B.
Affiliations
University of Georgia (US)
Venue
Medicine & Science in Sports & Exercise
Publisher
Ovid Technologies (Wolters Kluwer Health)
Published
1990-08
Volume
22
Issue
4
Pages
429???435
ISSN
0195-9131 (ISSN-L)
DOI
10.1249/00005768-199008000-00002
OpenAlex
W2052579376
Cited by
457
References
0
Citations by year
2026: 3 · 2025: 5 · 2024: 5 · 2023: 6 · 2022: 11 · 2021: 9 · 2020: 11 · 2019: 15 · 2018: 15 · 2017: 13 · 2016: 10 · 2015: 11 · 2014: 20 · 2013: 17 · 2012: 21
FWCI
8.87
Type
journal article
Language
en
Open access
closed
Locations
  • Medicine & Science in Sports & Exercise (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (2s07rr007025-26, 7r01am037098-01)
  • National Center for Research Resources (S07RR-07025-21)
Topics
  • Health Sciences › Medicine › Physiology (medical) › Exercise and Physiological Responses
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
  • Health Sciences › Medicine › Surgery › Muscle and Compartmental Disorders
Keywords
exercise-induced muscle damage, eccentric exercise, sarcomere disruption, myofibril damage, creatine kinase release, delayed onset muscle soreness, intracellular calcium homeostasis, phospholipase A2, leukotrienes, prostaglandins, free radical generation, lysophospholipids
MeSH terms
Calcium, Free Radicals, Homeostasis, Humans, Hydrogen-Ion Concentration, Mechanoreceptors, Mitochondria, Muscle, Muscle Contraction, Muscles, Sarcolemma, Sprains and Strains, Exercise

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