The answer is simple, because it makes me feel better. And after 40 years of knitting almost every day, I now know why it has that effect on me. Slowly I have gathered a wealth of information on the benefits of knitting. The research from institutions like Harvard's Medical School and the Mayo Clinic have proven the many mental and physical benefit claims. I once told my physician that diet and exercise help, but I credit knitting for my good health—he has encouraged me to continue.