There are a ton of postives from meditation
http://www.ncbi.nlm.nih.gov/pubmed/17940025
lower anxiety, depression, anger, and fatigue, and higher vigor on the Profile of Mood States scale, a significant decrease in stress-related cortisol, and an increase in immunoreactivity.
http://www.ncbi.nlm.nih.gov/pubmed/1801007
It was found that after meditation, serum cortisol levels were significantly reduced, serum total protein level significantly increased, and systolic pressure, diastolic pressure and pulse rate significantly reduced.
It even turns off stress related genes
http://www.ncbi.nlm.nih.gov/pubmed/18596974
This study provides the first compelling evidence that the RR elicits specific gene expression changes in short-term and long-term practitioners.
RR = Relaxation Response, a form of meditation from Herbert Benson
Good Luck. You will feel like a caged animal whe you first try to meditate. This will pass with time