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.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
Enrollment
60
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.
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.
Gazi University
Ankara, Turkey (Türkiye)
Ankle Range of Motion (Plantar/Dorsiflexion)
Plantar and dorsiflexion measured using a goniometer (degrees).
Time frame: Pre-intervention (T0) and post-intervention (T1, within 3-5 minutes).
Y-Balance Test
Anterior, posteromedial, and posterolateral reach distances (cm).
Time frame: Pre-intervention (T0) and post-intervention (T1, within 3-5 minutes).
Jumping Performance:
Vertical jump height and horizontal jump distance (cm).
Time frame: 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).
Time frame: Pre-intervention (T0) and post-intervention (T1, within 3-5 minutes).
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