I, too, have a tendency to lean back while climbing stairs. I also observed that this only happens if look up the stairs. This is because any attempt to tilt my head back also causes my trunk to bend backwards. I assume this is due to the lack of fine muscle control. Bruce 54/8 Sinemet CR 50/200 1.5 tab X4 Pramipexole 1.5 mg tab X3 "My other body is symptom free" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Bruce G. Warr "Experience is what enables us to recognize Healthcare Informatics Lab a mistake the next time we make it." Information Systems Dept. University of Maryland Baltimore County http://umbc.edu/~warr/ (V) (410)455-3206 (F) (410)455-1073 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~