You can view abstracts of my publications at the following links (full text is available upon request at: drdebihoffman@comcast.net ):

Exercisers Achieve Greater Acute Exercise-Induced Mood Enhancement Than Nonexercisers.   http://www.ncbi.nlm.nih.gov/pubmed/18226663

Does aerobic exercise improve pain perception and mood? A review of the evidence related to healthy and chronic pain subjects.   http://www.ncbi.nlm.nih.gov/pubmed/17367586