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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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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Activator-Assisted Talocrural Manipulation | Experimental | 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. |
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| Sham Soft Tissue Stroking | Sham Comparator | 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. |
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| 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. |
| Measure | Description | Time Frame |
|---|---|---|
| Ankle Range of Motion (Plantar/Dorsiflexion) | Plantar and dorsiflexion measured using a goniometer (degrees). | Pre-intervention (T0) and post-intervention (T1, within 3-5 minutes). |
| Y-Balance Test | Anterior, posteromedial, and posterolateral reach distances (cm). | Pre-intervention (T0) and post-intervention (T1, within 3-5 minutes). |
| Jumping Performance: | Vertical jump height and horizontal jump distance (cm). | Pre-intervention (T0) and post-intervention (T1, within 3-5 minutes). |
| Dynamic Weight Transfer | Assessed via pedobarographic analysis, including static load ratio (%), dynamic contact area ratio (CAR-AP, CAR-RP, %), and dynamic speed (mm/s). | Pre-intervention (T0) and post-intervention (T1, within 3-5 minutes). |
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Inclusion Criteria:
Exclusion Criteria:
Elite male volleyball players aged 15-25 years
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Gazi University | Ankara | Turkey (Türkiye) |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 41053891 | Derived | Haksever B, Hajighorbani K, Cakir CH, Isguzar MG, Elbasan B. Investigation of the effect of activator-assisted talocrural joint manipulation on acute sports performance parameters in elite male volleyball players. BMC Sports Sci Med Rehabil. 2025 Oct 7;17(1):291. doi: 10.1186/s13102-025-01358-1. |
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Individual participant data (IPD) will not be shared due to privacy concerns and institutional data protection policies.
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Single Blind (Statistician analyzing data was blinded)
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| 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. |
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| ID | Term |
|---|---|
| D009043 | Motor Activity |
| ID | Term |
|---|---|
| D001519 | Behavior |
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