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Implication of Stiffness of the Hamstrings, Achilles Tendon and Calf Muscles for Jumping Performance

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT02842892
Recruitment Status : Completed
First Posted : July 25, 2016
Last Update Posted : February 28, 2018
Information provided by (Responsible Party):
Prof. Dr. Dr. Winfried Banzer, Goethe University

Brief Summary:

For optimal jumping performance an adequate interaction of muscles and tendons is required. A parameter in the functional evaluation of both structures is their stiffness (resistance of the tissue against deformation by external forces). It is unclear so far if higher stiffness values of tendon or muscle or a specific stiffness relation of both tissues is the cause of better jumping performance. The present study examines this based on the Achilles tendon and the calf muscles or the patellar tendon and the hamstrings by three different forms of jumps (squat jump, counter-Movement Jump, Drop-Jump).

The plan is to include young healthy volunteers aged 18 to 40 years. In a cross-sectional study, the jump height of the participants will be measured for each jump form: squat jump (jump from a squatting position), Counter-Movement Jump (jump with backswing by going into the knees) or drop jump (jump from small box with direct re-jump). The order of the jump form is determined randomly. The measurements are carried out within one day. Furthermore the international physical activity questionnaire will be used in order to assess the level of physical activity.

As primary outcome the stiffness of the calf muscles, achilles tendon, hamstring and patellar tendon will be detected. The measurement is carried out before the jumps (there are three jumps after one sample jump performed). The measurement is executed non-invasively and completely painless using Indentometers and MyotonPro. With both devices, minimal pressure on the examined tissue will be exerted and measured how much of this can be compressed.

Condition or disease Intervention/treatment Phase
Tissue Compliance Other: Tissue stiffness Not Applicable

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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 35 participants
Primary Purpose: Diagnostic
Study Start Date : July 2016
Actual Primary Completion Date : April 2017
Actual Study Completion Date : April 2017

Arm Intervention/treatment
Squat Jump Other: Tissue stiffness
Drop Jump Other: Tissue stiffness
Countermovement Jump Other: Tissue stiffness

Primary Outcome Measures :
  1. Tissue Stiffness (calf muscles, achilles tendon, hamstring and patellar tendon) using two different tissue compliance meter (Indentometer Pro; Myoton Pro). [ Time Frame: 15 Min. ]

Secondary Outcome Measures :
  1. Jumping performance (counter movement jump, drop jump, squat jump) using a contact time mat (Refitronic) [ Time Frame: 10 Min ]

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 65 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Healthy

Exclusion Criteria:

  • Drug intake in the past 48 hours
  • Pregnancy
  • Muscle soreness

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT02842892

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Department of Sports Medicine, Goethe University Frankfurt/Main
Frankfurt/Main, Hessen, Germany, 60487
Sponsors and Collaborators
Goethe University
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Responsible Party: Prof. Dr. Dr. Winfried Banzer, Head of Department, Goethe University Identifier: NCT02842892    
Other Study ID Numbers: SpM2016-004
First Posted: July 25, 2016    Key Record Dates
Last Update Posted: February 28, 2018
Last Verified: February 2018