Comparative Effects of Vocal and Breathing Exercises on Respiratory Function and Trunk Stability in Women

The goal of this randomized clinical trial is to investigate whether vocal exercises or breathing exercises improve respiratory function and trunk stability in healthy adult women aged 18-65. The main questions it aims to answer are: Do vocal exercises improve respiratory function, respiratory muscle strength, endurance, and trunk stability? Do breathing exercises improve respiratory function, respiratory muscle strength, and endurance? Researchers will compare the vocal exercises group to the breathing exercises group to determine if one intervention has a superior effect on lung function, respiratory muscle performance, and trunk stability. Participants will: Perform a 6-week program of either vocal exercises or breathing exercises, with sessions twice per week, 30 minutes each. Complete pre- and post-intervention assessments including thoracic excursion, breath-hold tests, spirometry, Dynamic Neuromuscular Stabilization (DNS) tests, and trunk stability tests using the Stabilizer pressure biofeedback device. Engage with instructional videos and guidance through a closed social media group, allowing questions and feedback to ensure correct technique.