Effects of Carbon Fiber Insoles on CMJ and Sprint Performance

This study evaluates the effects of VKTRY carbon fiber insoles on vertical jump and sprint performance in moderately active men. Participants will perform tests with and without insoles, assessing both objective performance and subjective perception using a Likert-type scale.

Study Overview

• Status: Recruiting
• Conditions: Healthy; Performance; Prevention; Sports Performance; Athletic Performance and Injury Risk; Sportsman; Healthy Adult Man
• Intervention / Treatment: Device: VKTRY Insoles

Detailed Description

This study aims to analyze the effects of using carbon fiber insoles (VKTRY) on physical performance in explosive tasks, specifically vertical jump (countermovement jump - CMJ) and sprinting, in moderately active young adults. The increasing use of ergonomic technologies in sports has sparked interest in devices such as these insoles, which promise to increase mechanical efficiency and propulsion during athletic movements, thanks to the rigidity and energy return capacity of carbon fiber.

Study Design: The study design is descriptive, observational, cross-sectional, and comparative. The sample will consist of men aged 18 to 30 years with regular sports participation (2-4 days per week). Each participant will perform vertical jump and sprint tests under two conditions: with and without carbon fiber insoles.

Measured Variables: The variables evaluated will include jump height (cm), flight time (ms), sprint time (s), maximum speed (km/h), and subjective perception via an adapted Likert-type survey. Objective evaluation will be conducted using the validated My Jump Lab application.

Expected Implications: The study seeks to determine whether these insoles significantly influence immediate sports performance, both in terms of physical parameters and athletes' perception. Results could have practical implications for training, injury prevention, and the use of ergonomic aids in amateur athletes.

• Study Type: Interventional
• Enrollment (Estimated): 38
• Phase: Not Applicable

Contacts and Locations

• Study Contact: Name: Benjamín Cuenca Valero; Phone Number: +34636695885; Email: benjamin.cuenca@ucv.es
• Study Contact Backup: Name: David Cárcel Martínez; Phone Number: +34601315992; Email: dacarmar@mail.ucv.es

Study Locations

• Spain
  • Valencia
    • Valencia, Valencia, Spain, 46001
      • Recruiting
      • Universidad Católica de Valencia
      • Contact: Benjamín Cuenca Valero; Phone Number: +34636695885; Email: benjamin.cuenca@ucv.es
      • Contact: David Cárcel Martínez; Phone Number: +34601315992; Email: dacarmar@mail.ucv.es
      • Sub-Investigator: Benjamín Cuenca Valero

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult
• Accepts Healthy Volunteers: Yes

Description

Inclusion Criteria:

• Men aged 18-30 years
• Moderate physical activity (2-4 times/week)
• No injuries in the last 6 months

Exclusion Criteria:

• Use of orthoses or podiatric pathologies
• Neurological or cardiovascular disease
• Refusal to sign informed consent

Study Plan

How is the study designed?

Design Details

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

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: With insoles; Use of VKTRY insoles during CMJ and sprint	Device: VKTRY Insoles; Carbon fiber insoles (VKTRY)
No Intervention: Without insoles; CMJ and sprint without VKTRY insoles

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Jump height difference (CMJ)	Measurement with the My Jump Lab app	Day 1

Secondary Outcome Measures

Outcome Measure	Time Frame
Flight time (ms)	Day 1
Sprint time (s)	Day 1
Maximum speed (km/h)	Day 1
Subjective assessment on Likert scale	Day 1

Collaborators and Investigators

• Sponsor: Benjamín Cuenca Valero
• Investigators: Study Director: Benjamín Cuenca Valero, Universidad Católica de Valencia (UCV) Facultad de Medicina y Ciencias de la Salud. C/ Quevedo, 2 - 46001 Valencia; Principal Investigator: David Cárcel Martínez, Universidad Católica de Valencia (UCV) Facultad de Medicina y Ciencias de la Salud. C/ Quevedo, 2 - 46001 Valencia

Publications and helpful links

General Publications

• Dierickx EE, Butler CR, Huggins RA, Zuk EF, Mason LC, Distefano LJ, Casa DJ. Carbon Fiber Insoles Enhance Perception of Performance Despite Variable Objective Outcomes: Specific to the Moderately Active Individual. Int J Exerc Sci. 2023 Jul 1;16(4):885-897. doi: 10.70252/EGDU7320. eCollection 2023.
• Tokutake G, Kuramochi R, Murata Y, Enoki S, Koto Y, Shimizu T. The Risk Factors of Hamstring Strain Injury Induced by High-Speed Running. J Sports Sci Med. 2018 Nov 20;17(4):650-655. eCollection 2018 Dec.

Helpful Links

• Página del producto VKTRY:

Study record dates

Study Major Dates

• Study Start (Actual): October 30, 2025
• Primary Completion (Estimated): June 15, 2026
• Study Completion (Estimated): June 30, 2026

Study Registration Dates

• First Submitted: December 9, 2025
• First Submitted That Met QC Criteria: May 13, 2026
• First Posted (Actual): May 15, 2026

Study Record Updates

• Last Update Posted (Actual): May 15, 2026
• Last Update Submitted That Met QC Criteria: May 13, 2026
• Last Verified: May 1, 2026

More Information

Terms related to this study

• Keywords: biomechanics; sprint; insoles; vertical jump; sports performance; carbon fiber insoles; my jump lab
• Other Study ID Numbers: UCV/2024-2025/052

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: YES
• IPD Plan Description: All underlying IPDs result in a publication
• IPD Sharing Time Frame: Once the study is completed and published, indefinitely.
• IPD Sharing Access Criteria: A data sharing agreement must be signed. Said data may be provided to duly identified researchers and for scientific research purposes, approved by the author and study director.
• IPD Sharing Supporting Information Type: STUDY_PROTOCOL; SAP; ICF; ANALYTIC_CODE; CSR

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No