Medication and exercise

I was diagnosed as PD in the year of Sept 2005 and taking Sinemet 25/100 one tablet at morning, afternoon and evening and one Jumet 5 mg at morning and afternoon only. I did very well in my gym classes at gym centre 2 -3 hours per day from Mon to Friday as I did not feel tired and exhausted. I took part body pump, combat, cardio, spinning, Yoga and Pilate when there were available in the gym. After 2 years in the gym exercises i.e 2005 to 2006 I started tired and exh