Hi Michael and Nicoletta,
I have had a couple of people ask this question about exercise and tremors. I have reached out to Miriam Rafferty, PHD who does a lot of research in PD. She, as well, has only had a couple of patients who get more tremor with exercise. The answer with a couple of patients has been to increase meds but it sounds like you are already on high dose Levodopa so this might not be the answer. In other patients, building strength and endurance tended to make the tremors more manageable over time. In your case, with weight loss and and weakness, I imagine that building back strength and endurance might make the symptoms more manageable. This will take time. There is not a physiological rationale for this increase in tremor other than that maybe the nervous system gets more excited with exercise and that should be a temporary response... not something that causes permanent progression of symptoms.
I would advocate for you to continue with exercise and try to stay consistent with it, even if it means short term increase in tremors. I would start back with Tai Chi and Yoga and consider adding in our Starter Series or ChairFit for some strength. If you can build more endurance and strength, then my hope is the tremors might resolve a bit. Keep in mind it takes 6-8 weeks to build strength and endurance can be a slow process so be patient.
I hope this helps and let me know how you are doing as time goes by.
All the best,