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

• ClinicalTrials.gov Identifier: NCT02842892
• Recruitment Status: Completed
• First Posted: July 25, 2016
• Last Update Posted: February 28, 2018
• Sponsor: Goethe University
• Information provided by (Responsible Party): Prof. Dr. Dr. Winfried Banzer, Goethe University

Tracking Information

• First Submitted Date: July 18, 2016
• First Posted Date: July 25, 2016
• Last Update Posted Date: February 28, 2018
• Study Start Date: July 2016
• Actual Primary Completion Date: April 2017 (Final data collection date for primary outcome measure)
• Current Primary Outcome Measures (submitted: July 22, 2016): Tissue Stiffness (calf muscles, achilles tendon, hamstring and patellar tendon) using two different tissue compliance meter (Indentometer Pro; Myoton Pro). [ Time Frame: 15 Min. ]
• Original Primary Outcome Measures: Same as current
• Current Secondary Outcome Measures (submitted: July 22, 2016): Jumping performance (counter movement jump, drop jump, squat jump) using a contact time mat (Refitronic) [ Time Frame: 10 Min ]
• Original Secondary Outcome Measures: Same as current
• Current Other Pre-specified Outcome Measures: Not Provided
• Original Other Pre-specified Outcome Measures: Not Provided

Descriptive Information

• Brief Title: Implication of Stiffness of the Hamstrings, Achilles Tendon and Calf Muscles for Jumping Performance
• Official Title: Not Provided

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.

• Detailed Description: Not Provided
• Study Type: Interventional
• Study Phase: Not Applicable
• Study Design: Primary Purpose: Diagnostic
• Condition: Tissue Compliance
• Intervention: Other: Tissue stiffness

Study Arms

• Squat Jump
  Intervention: Other: Tissue stiffness
• Drop Jump
  Intervention: Other: Tissue stiffness
• Countermovement Jump
  Intervention: Other: Tissue stiffness

• Publications *: Not Provided

Recruitment Information

• Recruitment Status: Completed
• Estimated Enrollment (submitted: July 22, 2016): 35
• Original Estimated Enrollment: Same as current
• Actual Study Completion Date: April 2017
• Actual Primary Completion Date: April 2017 (Final data collection date for primary outcome measure)

Eligibility Criteria

Inclusion Criteria:

• Healthy

Exclusion Criteria:

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

Sex/Gender

• Sexes Eligible for Study: All

• Ages: 18 Years to 65 Years (Adult, Older Adult)
• Accepts Healthy Volunteers: Yes
• Contacts: Contact information is only displayed when the study is recruiting subjects
• Listed Location Countries: Germany

Administrative Information

• NCT Number: NCT02842892
• Other Study ID Numbers: SpM2016-004
• Has Data Monitoring Committee: Not Provided
• U.S. FDA-regulated Product: Not Provided
• IPD Sharing Statement: Not Provided
• Responsible Party: Prof. Dr. Dr. Winfried Banzer, Goethe University
• Study Sponsor: Goethe University
• Collaborators: Not Provided
• Investigators: Not Provided
• PRS Account: Goethe University
• Verification Date: February 2018