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Original scientific paper

DIFFERENCES IN MUSCLE ACTIVITY ONE YEAR AFTER ACL RECONSTRUCTION

Mario Kasović orcid id orcid.org/0000-0002-4660-6900 ; Kineziološki fakultet Sveučilišta u Zagrebu
Zrinka Potočanac ; Fakultet elektrotehnike i računarstva, Sveučilište u Zagrebu, Hrvatska
Mario Cifrek ; Fakultet elektrotehnike i računarstva, Sveučilište u Zagrebu, Hrvatska
Anton Tudor ; Klinika za ortopediju Lovran, Medicinski fakultet, Sveučilište u Rijeci, Hrvatska
Mladen Mejovšek ; Kineziološki fakultet Sveučilišta u Zagrebu


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Abstract

This study aimed at comparing two most commonly
used ACL reconstruction techniques in Croatia. Subjects
were chosen amongst patients who were all active soccer
players operated on by the same physician and
rehabilitated in the same clinic, by the same therapist.
They were divided into two groups according to ACL
reconstruction technique used: PAT group (n = 5) was
treated byACL reconstruction using patellar tendon graft
and STG group (n = 5) was treated byACLreconstruction
technique using gracillis and semitendinosus tendon graft.
Control group (MODEL) comprised of completely
healthy active soccer players. One year after the
reconstruction our subjects performed one legged vertical
jump using their injured leg and surface electromyographic
signals of muscles rectus femoris, vastus
lateralis, vastus medialis and biceps femoris were
recorded.Vertical jump cycle was divided into five phases
based on vertical force platform measurements. Muscle
activity threshold was defined at 30% of maximum
amplitude of mean envelope of individual muscles in
MODEL group and several variables describing muscle
activity were defined. Nonparametric statistical methods
(KruskalWallis test and consecutive Mann Whitney tests
with Bonferroni correction) showed some statistically
significant differences: shorter activity period of the
muscle vastus lateralis in the flight phase for the PAT
group (.0249, p=.05 and .005051, p=.05, with Bonferroni
correction), delayed end of vastus medialis muscle
activity in the take off phase for the STG group (.0179,
p=.05 and .005051, p=.05, with Bonferroni correction)
when compared to MODEL group and longer activity of
the muscle vastus lateralis in the STG group (.0132, p=.05
and .015873, p=.05, with Bonferroni correction) with
respect to the PATgroup in the landing1 phase.
Based on this we are unable to conclude which of
these two surgery techniques should be preferred.

Keywords

knee, electromyography, athletes, ACL

Hrčak ID:

47832

URI

https://hrcak.srce.hr/47832

Article data in other languages: croatian

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