I commute for a few reasons.

-I like it.

-I gave up driving 14 years ago and never looked back, I HATE HATE HATE driving.

-It's good for me: I almost died from a blood clot last year after suffering a serious shoulder injury. My mother worked for 40 years in the medical field, 25 years as a nurse. She suspects that the clot was caused by some of the medications I was taking for the shoulder injury. Riding is a form of rehabiliation on my leg muscles that had residual damage from the clot. The doctors never were able to determine the exact cause of the clot. It's amazing to me how such a short term injury can have such long term efffects. My leg is slowly coming back to my pre-injury level.

I know people who suffered a similiar type of vascular injury and it permanently effected their ability to walk or stand for any legnth of time. That won't be me. That which doesnt kill me, can only make me stronger.