Differences in Autonomic Recovery Between Physically Active and Inactive Women Following an Automated Massage Chair Intervention

The goal of this study is to investigate whether an automated massage chair can improve the body's recovery system in healthy young women (aged 19-26 years) who are either physically active or inactive. The main questions it aims to answer are: 1. Does a single session in an automated massage chair improve heart rate variability (HRV) as an indicator of stress, relaxation, and recovery balance? 2. Do individuals who are more physically active recover better after using a massage chair compared to those who are inactive? Researchers will compare the physically active group to the physically inactive group to see if baseline physical activity levels influence the short-term recovery effects of the massage at different time points. Participants will: 1. Complete a standardized 20-minute automated massage chair session using a preset program at a self-selected moderate intensity. 2. Have their heart rate data collected at baseline, prior to the massage session. 3. Undergo follow-up heart rate data collection at 24, 48, and 72 hours after the session to monitor short-term recovery changes.