Effects of Shoe Longitudinal Bending Stiffness (FAT-FLEX)

July 5, 2022 updated by: Centre Hospitalier Universitaire de Saint Etienne

Effects of Shoe Longitudinal Bending Stiffness on Changes in Energy Cost of Running During a 21 km Run

Carbon plates inserted in competitive running shoes have been increasingly used in the past 2-3 years and several investigations have shown that these plates increase the longitudinal bending stiffness (LBS) of the shoe. It leads to a redistribution of muscle work and to a modification of the force generation conditions, which may reduce the energy cost of running (Cr) and improve performance.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Only one study has investigated the effects of LBS in running bouts longer than 8 minutes but on the biomechanics part, and their effects on neuromuscular fatigue and prolonged running performance. The aim of this study is to compare shoes with and without carbon plates during a prolonged (21 km) running exercise on Cr, plantar flexor neuromuscular fatigue and running kinetics and kinematics to estimate the changes high-LBS may induce on fatigue and subsequent performance.

Study Type

Interventional

Enrollment (Actual)

21

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • France
      • Saint-Étienne, France, 42055
        • Unités de Myologie et de Médecine du Sport

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years to 50 years (Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

Male

Description

Inclusion Criteria:

  • aged ≥ 18 and ≤ 50 years.
  • men
  • experienced, well-trained endurance runners with the capacity to run 21km in less than 1h 40 and who train more than 5h a week.
  • free from muscular, bone or joint injuries
  • free from neurologic disease
  • approval received from a physician

Exclusion Criteria:

  • currently participating in a structured exercise program
  • injury in the 3 months prior to the protocol
  • chronic joint pathologies (e.g.: repetitive sprains, patellar or ligament problems)
  • the intake of corticosteroids within 3 months (inhalation, infiltration or history of prolonged corticosteroid therapy).

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Other
  • Allocation: Randomized
  • Interventional Model: Crossover Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Active Comparator: running with stiff shoes
21 km of running with stiff shoes followed by a time-to-exhaustion run.
Other: running flexible shoes
21kms of running flexible shoes followed by a time-to-exhaustion run.
Experimental: running flexible shoes
21 km of running flexible shoes followed by a time-to-exhaustion run.
Other: running flexible shoes
21kms of running flexible shoes followed by a time-to-exhaustion run.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
energy cost of running
Time Frame: during the last 4 minutes of a 21km race
amount of energy needed to travel a unit of distance
during the last 4 minutes of a 21km race

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
ankle plantar flexors
Time Frame: during the last 4 minutes of a 21km race
ankle plantar flexors maximal voluntary contraction
during the last 4 minutes of a 21km race

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Centre Hospitalier Universitaire de Saint Etienne

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

February 7, 2022

Primary Completion (Actual)

May 31, 2022

Study Completion (Actual)

June 28, 2022

Study Registration Dates

First Submitted

May 17, 2021

First Submitted That Met QC Criteria

May 17, 2021

First Posted (Actual)

May 20, 2021

Study Record Updates

Last Update Posted (Actual)

July 6, 2022

Last Update Submitted That Met QC Criteria

July 5, 2022

Last Verified

July 1, 2022

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 21CH034
  • 2021-A00726-35 (Other Identifier: ANSM)

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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