Jog in the morning? If so, that's a good thing -- just make sure you don't go through fume-infested traffic patterns in doing so.

If you've been diagnosed with heart disease -- even a mild form -- and are under doctor's orders to get regular exercise and change that diet, recent research says to stay away from diesel fumes if at all possible.

The research stated that even brief exposure to those fumes by men with stable heart disease caused restricted blood flow to their hearts. If your heart is weak already from mild heart disease, you surely don't want to compound that problem any further by your choice of outside jogging or walking venue.

Public park or treadmill are great alternatives, although one may not be as convenient and the other adds a decent amount of cost.