Even though this might be a new study, I'm not sure this is "news."
Don't we know this already? The happier you are, the healthier you are? Regardless of the fact that researchers in Nova Scotia felt the need to conduct a study--it lasted 10 years--that seems unnecessary, I did like this statement from the doctor involved:
Devote at least 15 to 20 minutes a day to doing something enjoyable and relaxing. And make sure this activity is not the first thing to be abandoned on a busy day.
That's good reason to BIKE.