Rate of Leg Curl to Leg Press During Isokinetic Testing

NCT03966690 | Completed

• 1 other identifier: IMP_Test
• Study Type: interventional
• Target: 28
• Locations: 1 country
• Sites: 1

Brief Summary

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.

Conditions

Muscle Strain

Outcome Measures

Primary Outcomes (1)

• Leg extension/leg-flexion rate

  Rate of leg extension to leg-flexion

  at baseline

Secondary Outcomes (4)

• Isokinetic leg extensors strength

  at baseline

• Isokinetic leg flexors strength

  at baseline

• Y-Balance Test

  at baseline

• Maximum jumping height

  at baseline

Study Arms (2)

leg curl device starters

EXPERIMENTAL

Group A randomly assigned to start with legcurl device

Device: Isokinetic leg extension/-flexion on a legpress device; Device: Isokinetic leg extension/-flexion on a legcurl device

legpress device starters

EXPERIMENTAL

Group A randomly assigned to start with legpress device

Device: Isokinetic leg extension/-flexion on a legpress device; Device: Isokinetic leg extension/-flexion on a legcurl device

Interventions

Isokinetic leg extension/-flexion on a legpress device DEVICE

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

leg curl device starters; legpress device starters

Isokinetic leg extension/-flexion on a legcurl device DEVICE

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

leg curl device starters; legpress device starters

Eligibility Criteria

• Age: 18 Years - 35 Years
• Gender Eligibility Details: Male elite soccer player
• Healthy Volunteers: No
• Age Groups: Adult (18-64)

You may qualify if:

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

You may not qualify if:

• no acute injuries

Sponsors & Collaborators

• University of Erlangen-Nürnberg Medical School: lead

Study Sites (1)

Institute of Medical Physics, University of Erlangen-Nurnberg

Erlangen, 91052, Germany

Location

MeSH Terms

Conditions

Sprains and Strains

Condition Hierarchy (Ancestors)

Wounds and Injuries

Study Officials

• Wolfgang Kemmler, PhD

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

  STUDY CHAIR

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: SINGLE
• Who Masked: INVESTIGATOR
• Purpose: DIAGNOSTIC
• Intervention Model: CROSSOVER
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: May 23, 2019
• First Posted: May 29, 2019
• Study Start: August 15, 2018
• Primary Completion: February 15, 2019
• Study Completion: May 15, 2019
• Last Updated: May 31, 2019

Record last verified: 2019-05

Data Sharing

• IPD Sharing: Will not share

Locations

DE (1)