Cited by 1,005Exercise and Physiological ResponsesMuscle Physiology and DisordersCardiovascular and exercise physiology

Myofibrillar damage following intense eccentric exercise in man

Fridén, J., Sjöström, M., Ekblom, B.·1983·International Journal of Sports Medicine

Abstract

Muscle soreness that has a delayed onset is a common feature among both athletes and untrained individuals who engage in unusual exercises. This study was designed to provide additional morphological data to assess the relevance and significance of our previous findings that the sore muscles contain fibers with disorganized myofibrillar material. Muscle biopsies were obtained from 12 males (mean age 25 +/- 7 years), who suffered from severe soreness in their thigh muscles 18--72 h following eccentric bicycle exercise. Their strength performance were tested in parallel. Knee extensor strength was decreased at all angular velocities soon after exercise but gradually increased over the subsequent days although slower at the fastest contractions. Disturbances of the cross-striated band pattern were constantly observed. They originated from the myofibrillar Z-band, which showed marked streaming, broadening and, at places, total disruption. The disturbances were found in every second to every third fiber up to 3 days after exercise and in one tenth of the fibers 6 days following the exercise. Type 2 fibers were predominantly affected. Thus, the eccentric exercise gives rise to muscles soreness and influences, on mechanical basis and selectively with regard to fiber type, the fine structure of the contractile apparatus.

Integrity signals

Registry

Crossref · 10.1055/s-2008-1026030

Cites

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

This paper’s full text isn’t openly available, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Cited by

Sorted by citations

Authors
Fridén, J., Sjöström, M., & Ekblom, B.
Affiliations
Karolinska Institutet (SE)
Venue
International Journal of Sports Medicine
Published
1983-08
Volume
04
Issue
03
Pages
170-176
ISSN
  • 0172-4622 (ISSN-L)
  • 1439-3964
OpenAlex
W2006955286
Cited by
1,005
References
0
Citations by year
2026: 13 · 2025: 14 · 2024: 21 · 2023: 16 · 2022: 22 · 2021: 24 · 2020: 31 · 2019: 27 · 2018: 33 · 2017: 26 · 2016: 28 · 2015: 29 · 2014: 33 · 2013: 37 · 2012: 35
FWCI
15.43
Type
journal article
Language
en
Open access
closed
Locations
  • International Journal of Sports Medicine (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Muscular Dystrophy Association
  • Vetenskapsrådet
Topics
  • Health Sciences › Medicine › Rehabilitation › Exercise and Physiological Responses
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
  • Health Sciences › Medicine › Complementary and alternative medicine › Cardiovascular and exercise physiology
Keywords
delayed onset muscle soreness, eccentric exercise, myofibrillar damage, muscle fiber ultrastructure, fast-twitch muscle, quadriceps strength, muscle strength recovery, exercise-induced muscle damage, thigh muscle
MeSH terms
Adolescent, Adult, Biopsy, Physical Exertion, Humans, Knee, Male, Microscopy, Electron, Mitochondria, Muscle, Muscle Contraction, Myofibrils, Pain, Time Factors

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review