ST. LOUIS (KMOX) -  You may find yourself battling a bad attitude at the tail end of your long, daily commute.

But a researcher at Washington University suggests that spending a lot of time in traffic day after day is bad for your health, as well.

“Commuting greater than 15 miles, you’re less likely to achieve high fitness levels,” says Wash U’s Christine Hoehner. “You’re also more likely to be obese. For blood pressure, the threshold appears to be commuting more than ten miles.”

Her suggestion?

Long range commuters should work in time for walking either during or after work, if possible, and break up sitting time if you’re chained to a desk.

The new study appears in the American Journal of Preventative Medicine.