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Completed

NCT Number: NCT07072260

Effect of Activator-Assisted Talocrural Manipulation on Performance in Elite Volleyball Players

This randomized controlled trial aims to evaluate the acute effects of activator-assisted talocrural joint manipulation on joint range of motion, dynamic balance, vertical and horizontal jump performance, and weight transfer parameters in elite male volleyball players aged 18-25. The study compares a manipulation group with a sham control group and assesses performance metrics before and after the intervention.

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Key information

Conditions

Joint Manipulation Athletic Performance Balance Behavior Jumping Performance Motor Activity Physical Therapy Modalities Postural Balance Range of Motion Sports Volleyball

Age range

15 year–25 year

Sex eligibility

Male

Study type

Interventional

Phase

Not applicable

Primary location

Gazi University

Ankara, Turkey (Türkiye)

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Elite male volleyball players aged 15-25 years
  • Minimum of 3 years of professional volleyball training experience
  • Active member of a team and club

Exclusion criteria

  • Not actively participating in training or matches
  • History of acute musculoskeletal pathology or surgery in the lower extremities

Treatment and study plan

Sham Stroking

Other

Participants in this group receive a sham intervention consisting of light soft tissue stroking around the talocrural joint without joint manipulation. The application mimics the duration and setup of the experimental group but does not include any mechanical stimulus.

Other names: Non-therapeutic light touch technique

Activator Manipulation

Other

Participants in this group receive a single session of activator-assisted manipulation using the Activator Adjustment Instrument (AAI) to the talocrural (ankle) joint. Six impulses (three anterior and three posterior) are applied with the ankle in a neutral position.

Other names: Activator Adjustment Instrument (AAI)

Primary outcomes

  1. Ankle Range of Motion (Plantar/Dorsiflexion)

    Time frame: Pre-intervention (T0) and post-intervention (T1, within 3-5 minutes).

    Plantar and dorsiflexion measured using a goniometer (degrees).

  2. Y-Balance Test

    Time frame: Pre-intervention (T0) and post-intervention (T1, within 3-5 minutes).

    Anterior, posteromedial, and posterolateral reach distances (cm).

  3. Jumping Performance:

    Time frame: Pre-intervention (T0) and post-intervention (T1, within 3-5 minutes).

    Vertical jump height and horizontal jump distance (cm).

  4. Dynamic Weight Transfer

    Time frame: Pre-intervention (T0) and post-intervention (T1, within 3-5 minutes).

    Assessed via pedobarographic analysis, including static load ratio (%), dynamic contact area ratio (CAR-AP, CAR-RP, %), and dynamic speed (mm/s).

Sponsors and collaborators

Lead sponsor

Ankara Yildirim Beyazıt University

Other

Registry information

Official study title

Investigation of the Effect of Activator-Assisted Talocrural Joint Manipulation on Acute Sports Performance Parameters in Elite Male Volleyball Players

Important dates

Study start
2025
Primary completion
2025
Study completion
2025
First posted
Jul 18, 2025
Registry last updated
Jul 18, 2025

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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