Anterior Cruciate Ligament Reconstructed Female Athletes Exhibit Relative Muscle Dysfunction after Return to Sport

Christiana J Raymond-Pope, Donald R. Dengel, John S. Fitzgerald, Bradley J. Nelson, Tyler A Bosch

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1 Scopus citations


We sought to examine the relationship between upper-leg compartmental lean mass, muscle-specific strength, and explosive strength following anterior cruciate ligament reconstruction. Twleve adolescent female athletes with prior anterior cruciate ligament reconstruction were individually-matched by age (16.4±0.9 vs. 16.4±1.0 yrs.), body mass index (23.2±2.1 vs. 23.2±2.7 kg/m 2), and sport to 12 female athlete controls. One total-body and 2 lateral-leg dual X-ray absorptiometry scans measured total/segmental body composition. Isokinetic dynamometry measured knee extensor/flexor peak torque. Squat jumps on force platforms measured bilateral peak vertical ground reaction force. Paired t-tests assessed lean mass, peak torque, and force between previously-injured athletes' legs and between previously-injured and control athletes' legs. Previously-injured athletes' involved vs. non-involved leg demonstrated lower total (7.13±0.75 vs. 7.43±0.99 kg; p<0.01) and anterior (1.49±0.27 vs. 1.61±0.23 kg; p<0.01) and posterior (1.90±0.19 vs. 2.02±0.21 kg; p=0.04) upper-leg lean mass. Involved leg peak torque (1.36±0.31; 1.06±0.27; 0.97±0.19 Nm/kg) was lower vs. non-involved leg (1.71±0.36; 1.24±0.33; 1.04±0.15 Nm/kg; p<0.01-0.02) for extension at 60 and 120°/sec and flexion at 60°/sec and vs. controls' 'matched' leg (1.77±0.40 Nm/kg; p=0.01) for extension at 60°/sec. Involved leg force (296±45N) was lower vs. non-involved leg (375±55N; p<0.01) and vs. controls' 'matched' leg (372±88N; p=0.02). One-year post-anterior cruciate ligament reconstruction, adolescent female athletes' involved leg demonstrated relative muscle dysfunction.

Original languageEnglish (US)
Pages (from-to)336-343
Number of pages8
JournalInternational Journal of Sports Medicine
Issue number4
StatePublished - Oct 23 2020

Bibliographical note

Funding Information:
This work was supported by funding from NIH/NIAMS T32

Publisher Copyright:
© 2021 American Institute of Physics Inc.. All rights reserved.


  • ACL
  • dual X-ray absorptiometry (DXA)
  • isokinetic dynamometry
  • squat jump

PubMed: MeSH publication types

  • Journal Article


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