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Rate of Leg Curl to Leg Press During Isokinetic Testing

NCT ID: NCT03966690

Last Updated: 2019-05-31

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

COMPLETED

Clinical Phase

NA

Total Enrollment

28 participants

Study Classification

INTERVENTIONAL

Study Start Date

2018-08-15

Study Completion Date

2019-05-15

Brief Summary

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The functional condition of the leg muscles is not only relevant to performance in sports, but is also of great importance in health, prevention and rehabilitation, where not only the general strength level is decisive but also the relationship between individual muscle groups. Among other things the H-Q-ratio (strength ratio of "hamstring" muscles to quadriceps muscles) is often used to diagnose possible imbalances. Isokinetic force measurements have established themselves as the gold standard in competitive football. In this context, however, force tests in the open kinetic chain (OKC) have almost exclusively been used so far. Especially force measurements in the closed kinetic chain (CKC) could have a higher relevance regarding functionality. The H-Q-ratio should better be called the flex-ext-ratio in the CKC due to the involvement of the hip muscles. There is little data in the literature on leg force or flex-ext-ratio in CKC. In particular, there is hardly any comparative data for isokinetic measurement systems in the CKC. Using a cross over design and randomly allocating 28 competitive football players into two groups (n=14 each) that either started tests with the leg press or legcurl device, the investigators assumed (1) a significantly lower flex-ext-ratio in the CKC compared to the OKC, (2) a correlation between the isokinetic measurement systems in the OKC and the CKC, and (3) a significant superiority of the leg press to predict functional performance of the lower limbs.

Detailed Description

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Conditions

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Muscle Strain

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

CROSSOVER

Primary Study Purpose

DIAGNOSTIC

Blinding Strategy

SINGLE

Investigators

Study Groups

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leg curl device starters

Group A randomly assigned to start with legcurl device

Group Type EXPERIMENTAL

Isokinetic leg extension/-flexion on a legpress device

Intervention Type DEVICE

Maximum strength and rate of leg-flexion /-extension during legpress exercise

Isokinetic leg extension/-flexion on a legcurl device

Intervention Type DEVICE

Maximum strength and rate of leg-flexion /-extension during legcurl exercise

legpress device starters

Group A randomly assigned to start with legpress device

Group Type EXPERIMENTAL

Isokinetic leg extension/-flexion on a legpress device

Intervention Type DEVICE

Maximum strength and rate of leg-flexion /-extension during legpress exercise

Isokinetic leg extension/-flexion on a legcurl device

Intervention Type DEVICE

Maximum strength and rate of leg-flexion /-extension during legcurl exercise

Interventions

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Isokinetic leg extension/-flexion on a legpress device

Maximum strength and rate of leg-flexion /-extension during legpress exercise

Intervention Type DEVICE

Isokinetic leg extension/-flexion on a legcurl device

Maximum strength and rate of leg-flexion /-extension during legcurl exercise

Intervention Type DEVICE

Eligibility Criteria

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Inclusion Criteria

* male elite soccer players (5th-6th German soccer division)

Exclusion Criteria

* no acute injuries
Minimum Eligible Age

18 Years

Maximum Eligible Age

35 Years

Eligible Sex

MALE

Accepts Healthy Volunteers

No

Sponsors

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University of Erlangen-Nürnberg Medical School

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Wolfgang Kemmler, PhD

Role: STUDY_CHAIR

Institute of Medical Physics, University of Erlangen-Nürnberg, Germany

Locations

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Institute of Medical Physics, University of Erlangen-Nurnberg

Erlangen, , Germany

Site Status

Countries

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Germany

Other Identifiers

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IMP_Test

Identifier Type: -

Identifier Source: org_study_id