The goal of this clinical trial is to determine whether adding strength training to aerobic training has a comparable or greater effect on the clinical status of Parkinson's disease patients than a standalone aerobic training. \- Does combined strength-endurance circuit training provide added benefits to physical performance, disease severity, blood biomarkers, and quality of life in PD patients compared to standalone aerobic training? Participants will: * undergo outcome measurements before and after the 12-week intervention and a 3-month follow-up measurement, * visit the clinic twice a week for 1-hour training sessions. * selected patients will be given a smartwatch with a pedometer that will count their average number of steps before, during and after the training period