The Design and Evaluation of an Active Intervention for the Prevention of Non-contact ACL Injury

Stanford University17 enrolled

Overview

The overall goal of this project is to reduce the risk for anterior cruciate ligament injuries by designing a targeted intervention that will alter the known kinematic and kinetic risk factors associated with ACL injuries.

This study will address the following specific aims: 1) To optimize a wearable, targeted, active training feedback device to reduce the risk of ACL injury among healthy subjects by inducing patterns of movement that alter the known kinematic and kinetic risk factors associated with ACL injuries. 2) To evaluate the efficacy of the active device and determine if the device reduces the risk of ACL injury among healthy subjects by effectively inducing patterns of movement that alter the known kinematic and kinetic risk factors associated with ACL injuries.

Study Type

INTERVENTIONAL

Allocation

Purpose

PREVENTION

Masking

NONE

Enrollment

Conditions

Athletic Injuries Sprains and Strains Wounds and Injuries Knee Injuries

Interventions

Activity Training with FeedbackDEVICE

The feedback system consisted of three small inertial measurement units affixed on the chest, thigh, and shank segment respectively. These units were connected to a computer that recorded the signal from the inertial sensors at 240 Hz during the jump task. Using custom software, the knee flexion angle, trunk lean, and coronal thigh angular velocity were calculated immediately after the subject completed the jump trial. A projector was used to display the results of the jump analysis. It took less than 10 minutes to place this system on a subject and less than five seconds to analyze a jump.

Eligibility

Sex: ALLMin age: 18 YearsMax age: 65 YearsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria:The ages would range from 18 to 65. Both male and female subjects will be enrolled, and ethnic backgrounds would be mixed. Exclusion Criteria:(i) chronic lower body pain (ii) recent surgery of the lower or upper body (limitation of range of motion) (iii) previous history of ligament, meniscal, or chondral injury requiring surgery to the lower limb (iv) inability to complete jumping tasks

Locations (1)

Stanford University School of Medicine

Stanford, California, United States

Outcomes

Primary Outcomes

Knee Flexion Angle and Trunk Flexion Angle After Activity Training With Feedback

Knee flexion angle describes the angle between the tibia and femur during the activity. Trunk flexion is the angle between the shoulders and the hips during the activity.

Time frame: 1 day

Secondary Outcomes

Thigh Coronal Angular Velocity After Feedback Training

How fast the thigh is moving relative to the tibia during the activity, measured in degrees/second.

Time frame: 1 day

Data from ClinicalTrials.gov

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