Whole-Body Photobiomodulation for Motor and Cognitive Changes in Parkinson's Disease

This study is testing whole-body photobiomodulation therapy — a treatment that uses specific wavelengths of light delivered over the entire body — to see if it can improve movement and thinking in people with Parkinson's disease. **You may be eligible if...** - You are 40 years or older - You have been diagnosed with Parkinson's disease at a mild to moderate stage (Hoehn and Yahr stages 1–3) - You are able to walk independently without a mobility aid **You may NOT be eligible if...** - You have severe cognitive impairment (very low score on a standard memory test) - You have had deep brain stimulation (DBS) surgery - You have light-sensitive skin conditions or are taking medications that cause sensitivity to light - You have severe medical conditions that prevent participation Talk to your doctor to see if this trial is right for you.