Effects of Eccentric Training in the Rehabilitation of Patients Undergoing Anterior Cruciate Ligament Reconstruction: a Randomized Controlled Trial

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

RECRUITING

Clinical Phase

NA

Total Enrollment

34 participants

Study Classification

INTERVENTIONAL

Study Start Date

2025-03-01

Study Completion Date

2026-12-31

Brief Summary

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This study aims to investigate the effects of eccentric training on the functional rehabilitation of patients undergoing Anterior Cruciate Ligament Reconstruction (ACL-R). Thirty-four participants undergoing ACL-R will be randomly assigned to two groups: the Conventional Training Group (CTG) and the Eccentric Training Group (ETG). Both groups will adhere to the same post-surgical rehabilitation program, commencing in the first week after ACL-R and continuing until the criteria for sports resumption are achieved. The rehabilitation program will be structured into four phases: immediate post-operative, preparatory, general acquisition, and specific acquisition. The key distinction between the groups lies in their exercise regimen: ETG will prioritize the eccentric phase of movement, whereas CTG will engage in conventional exercises, maintaining uniform load across both movement phases. Assessment procedures will be conducted at three intervals for all participants: immediately post-operative, at 12 weeks post-ACL-R surgery (before the initiation of the training protocol), and at 25 weeks post-ACL-R surgery (upon completion of the training protocol). The primary outcome measure will be the maximum isometric strength of knee extensors. Secondary outcomes will encompass functional status, maximum isometric strength of knee flexors, peak dynamic strength during leg press, quadriceps muscle atrophy, performance in jump tests, and psychological readiness.

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Detailed Description

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Conditions

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Anterior Cruciate Ligament Reconstruction Rehabilitation Anterior Cruciate Ligament Reconstruction

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

SINGLE

Outcome Assessors

Study Groups

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Conventional Training Group

Conventional concentric and eccentric phases

Group Type ACTIVE_COMPARATOR

Conventional Training

Intervention Type OTHER

Patients will execute the concentric and eccentric phases unilaterally, maintaining consistent load levels, with each phase lasting 2 seconds.

Eccentric Training Group

Focus on the eccentric phase of movement

Group Type EXPERIMENTAL

Eccentric Training

Intervention Type OTHER

The concentric phase will be performed bilaterally in approximately 1 second, followed by the unilateral eccentric phase lasting approximately 3 seconds.

Interventions

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Conventional Training

Patients will execute the concentric and eccentric phases unilaterally, maintaining consistent load levels, with each phase lasting 2 seconds.

Intervention Type OTHER

Eccentric Training

The concentric phase will be performed bilaterally in approximately 1 second, followed by the unilateral eccentric phase lasting approximately 3 seconds.

Intervention Type OTHER

Eligibility Criteria

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Inclusion Criteria

\- Individuals of both genders, aged between 18 and 40 years, scheduled for ACL reconstruction surgery during the data collection period.

Exclusion Criteria

* Delay of more than 7 days after surgery to initiate the rehabilitation program proposed by the study;
* Presence of injuries related to the rupture of the ACL that hinder partial weight-bearing in the first week after surgery, either due to medical recommendation or the patient inability/disposition.

Minimum Eligible Age

18 Years

Maximum Eligible Age

40 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No