Effect of Foot Core Exercises on Jump Performance in Professional Volleyball Players

NCT07407478 | Not Yet Recruiting

• 1 other identifier: 2025/222
• Study Type: interventional
• Target: 43
• Locations: 1 country
• Sites: 1

Brief Summary

Brief Summary The purpose of this study is to investigate the effect of foot core exercises on jump performance in professional volleyball players. Participants will be randomly assigned to two groups. The first group will perform a strength training program only, while the second group will perform foot core exercises in addition to the same strength training program. Jump performance will be assessed using the Countermovement Jump (CMJ) test, and performance scores will be obtained through force-time analysis using the ForceDecks system. The findings of this study are expected to contribute to the development of training programs aimed at improving performance and reducing injury risk in professional volleyball players.

Conditions

Athletic Performance

Keywords

Foot Core Exercise; Jump Performance; Volleyball Players; Countermovement Jump; Force Plates; Athletic Performance

Outcome Measures

Primary Outcomes (1)

• Vertical Jump Height (Countermovement Jump)

  Maximum vertical jump height measured during the Countermovement Jump (CMJ) test.

  Baseline and post-intervention (approximately 8 weeks)

Secondary Outcomes (1)

• Force-Time Variables During Countermovement Jump

  Baseline and post-intervention (approximately 8 weeks)

Study Arms (2)

Strength Training Group

ACTIVE COMPARATOR

Description Participants in this group will perform a standardized lower-extremity strength training program routinely used for professional volleyball players.

Behavioral: Strength Training Program

Strength Training plus Foot Core Exercise Group

EXPERIMENTAL

Experimental: Strength Training Plus Foot Core Exercises Group Description Participants in this group will perform the same standardized lower-extremity strength training program in addition to a foot core exercise program targeting intrinsic and extrinsic foot muscles.

Behavioral: Strength Training Program; Behavioral: Foot Core Exercise Program

Interventions

Strength Training Program BEHAVIORAL

Description Participants will perform a standardized lower-extremity strength training program routinely used for professional volleyball players. Arms Assigned * Strength Training Group * Strength Training Plus Foot Core Exercises Group

Strength Training Group; Strength Training plus Foot Core Exercise Group

Foot Core Exercise Program BEHAVIORAL

Description Participants will perform foot core exercises targeting intrinsic and extrinsic foot muscles. The exercises are designed to improve foot stability and functional control. Arms Assigned ✔️ Strength Training Plus Foot Core Exercises Group ❌ Strength Training Group (işaretleme)

Strength Training plus Foot Core Exercise Group

Eligibility Criteria

• Age: 18 Years - 35 Years
• Gender Eligibility Details: Only male professional volleyball players are eligible to participate in this study.
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64)

You may qualify if:

• Male professional volleyball players aged 18 to 35 years
• Actively licensed athletes competing in clubs affiliated with the Turkish Volleyball Federation
• Regular participation in team training sessions without interruption for at least the past 3 months
• No history of surgery or serious injury involving the lower extremities (foot, ankle, knee, or hip) within the last 6 months
• Agreement not to participate in any additional strength, balance, or proprioception-based exercise programs during the study period
• No medical or physiological condition that would prevent participation in the Countermovement Jump (CMJ) test performed using the ForceDecks system
• Voluntary participation with written informed consent obtained prior to enrollment

You may not qualify if:

• Presence of deformity, chronic pain, or functional impairment in the foot or ankle
• History of lower extremity orthopedic surgery within the past 6 months
• History of neurological or vestibular disorders, or systemic diseases affecting balance
• Participation in physiotherapy interventions, rehabilitation protocols, or exercise programs outside the scope of the study during the study period

Sponsors & Collaborators

• Mudanya University: lead

Study Sites (1)

Mudanya University

Bursa, Mudanya, Turkey (Türkiye)

Location

Study Officials

• Hazal B Yılmaz, PhD

  Mudanya University

  PRINCIPAL INVESTIGATOR

Central Study Contacts

Önder Çalışkan, MSc Candidate

CONTACT

+905379125304; fztondercaliskan@outlook.com

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: NONE
• Masking Details: This study is conducted as an open-label trial. Both participants and researchers are aware of the interventions being administered. There are no additional parties masked in this clinical study.
• Purpose: PREVENTION
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Study Director

Model Details: This study is designed using a parallel assignment model. Participants will be randomly allocated into two groups. The first group will perform a standardized strength training program only, while the second group will perform foot core exercises in addition to the same strength training program. Both groups will be followed simultaneously throughout the intervention period.

Study Record Dates

• First Submitted: January 3, 2026
• First Posted: February 12, 2026
• Study Start: March 1, 2026
• Primary Completion (Estimated): March 1, 2027
• Study Completion (Estimated): June 1, 2027
• Last Updated: February 12, 2026

Record last verified: 2026-02

Data Sharing

• IPD Sharing: Will not share

Locations

TU (1)