Boxing-Based Training to Improve Balance and Mobility in Parkinson's Disease

The goal of this clinical trial is to learn if physical exercise that extensively and simultaneously challenges the brain's balance control network is effective in improving balance for people with mild to moderate Parkinson's disease. The study aims to test a specific hypothesis: that a physically demanding, "multidomain" program-which trains multiple areas of balance at the same time-will produce significantly better results than simple exercises that only partially address the balance network. To test this, researchers will use a specialized boxing-based program (EBA-B) as a model of challenging exercise. This will be compared to an active control group performing simple, low-intensity mobility movements in a chair. The main questions it aims to answer are: * Does exercise that simultaneously challenges multiple domains of balance (using boxing as a tool) produce superior global improvements compared to less demanding programs? * Is this extensive neural challenge more effective at reducing motor symptoms and improving functional mobility? Participants will: * Complete an 8-week "challenging" phase involving 50-minute group boxing sessions (EBA-B) 3 times per week, designed to challenge speed, agility, and coordination. * Complete an 8-week "simple exercise" phase involving 20-minute home-based mobility seated workout 5 times per week, along with weekly education talks. * Undergo clinical evaluations and balance tests at the start, middle, and end of the study to measure changes in their mobility