Further resarch showed me that the possible neuroprotective effects of exercise on PD are known a long time ago. I found articles about this from 2004 !!! We are now 8 years later. So I wonder why no clinical trials have been conducted to sort this out ??? Companies and organizations are looking for all these crazy meds for neuroprotectiveness ... while the most simple neuroprotectiveness could be fasting and exercise. I just can't believe this is not yet tested over several clinical trials. I am just shocked and dissapointed.