Comparison of Lower Limb COP and Muscle Activation During Single-Leg Deadlift Using Elastic and Inelastic Barbells
NCT ID: NCT07061314
Last Updated: 2025-07-11
Study Results
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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COMPLETED
NA
27 participants
INTERVENTIONAL
2025-02-15
2025-02-28
Brief Summary
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Detailed Description
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Center of Pressure (COP) data were recorded using a force platform to assess anterior-posterior (AP) and medial-lateral (ML) sway. Surface electromyography (EMG) was collected from eight lower limb muscles to evaluate neuromuscular responses. Data were analyzed using two-way repeated measures ANOVA.
The findings revealed that elastic barbells significantly reduced COP displacement and increased activation in the gluteus medius, biceps femoris, semitendinosus, and gastrocnemius muscles-particularly at high movement speeds. These results suggest that elastic barbells may improve dynamic stability and neuromuscular coordination, offering potential applications in sports rehabilitation and unilateral training programs.
Conditions
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Study Design
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NA
SINGLE_GROUP
TREATMENT
NONE
Study Groups
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Single-Group Crossover
Participants will perform single-leg deadlifts under two loading conditions: an elastic barbell and an inelastic barbell. Each condition will be tested at three different movement speeds (normal, fast, and power) in randomized order. Each participant completes all conditions as part of a within-subject repeated measures design
Elastic Barbell
A flexible plastic barbell that creates top-down perturbations during movement. Participants perform single-leg deadlifts using this elastic bar at three different speeds: normal (2 sec), fast (1 sec), and power (as fast as possible). The bar is loaded to 30% of the participant's estimated 1RM.
Inelastic Barbell
A standard rigid steel barbell with no elasticity. Participants perform single-leg deadlifts using this barbell under the same speed conditions and loading parameters as the elastic barbell.
Interventions
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Elastic Barbell
A flexible plastic barbell that creates top-down perturbations during movement. Participants perform single-leg deadlifts using this elastic bar at three different speeds: normal (2 sec), fast (1 sec), and power (as fast as possible). The bar is loaded to 30% of the participant's estimated 1RM.
Inelastic Barbell
A standard rigid steel barbell with no elasticity. Participants perform single-leg deadlifts using this barbell under the same speed conditions and loading parameters as the elastic barbell.
Eligibility Criteria
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Inclusion Criteria
At least 1 year of experience in resistance or functional training
Able to perform single-leg deadlift exercise safely
Provided written informed consent
Exclusion Criteria
Current pain or symptoms in the hip, knee, or ankle joints
Neurological, cardiovascular, or balance disorders
Participation in other conflicting research studies within the last 3 months
Inability to maintain single-leg stance for at least 5 seconds
Presence of skin irritation or condition at electrode placement sites
18 Years
ALL
Yes
Sponsors
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Busan University of Foreign Studies
OTHER
Responsible Party
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Ji Hwan Jeong
Principal Investigator
Principal Investigators
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Ji Hwan Jeong, MSc
Role: PRINCIPAL_INVESTIGATOR
Department of Sports and Health Convergence
Locations
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Busan University of Foreign Studies
Busan, , South Korea
Countries
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References
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Other Identifiers
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BUFS-SLDL-2025
Identifier Type: -
Identifier Source: org_study_id
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