Effect of Instrument-Assisted Soft Tissue Mobilization on Gastrocnemius Stiffness and Ankle Range of Motion

This study will examine whether a technique called instrument-assisted soft tissue mobilization (IASTM) can reduce stiffness in the calf muscle (gastrocnemius) and improve ankle mobility. Muscle stiffness will be measured using a specialized ultrasound method called shear-wave elastography, while ankle range of motion will be assessed using the weight-bearing lunge test. Healthy volunteers will participate in this study, and measurements will be taken before and after a single IASTM treatment. The aim is to determine if this manual therapy technique can produce immediate changes in muscle properties and joint flexibility.