My Saybrook University Mindfulness Moments program hosted a workshop by Dr. Donald Moss on Heart Rate Variability last year. The video is available on Saybrook’s Self Care channel at https://youtu.be/0fU55q0Z5OE?si=pR3fWXf5uocvTHK7
Dr. Moss offers additional comments on the applications for person’s with Parkinson’s. His article and other useful materials can be accessed at https://drdonaldmoss.wordpress.com/