Regular aerobioc workouts may significantly reduce the cardiovascular effects of stress, even helping to prevent high blood pressure and heart attacks, says the Reebok Aerobic Information Bureau.

A University of North Carolina study split 174 men into three groups based on their aerobic activity levels: low, medium and high. Each man took a reaction-time test after being told that he would receive an electric shock if his score was not high enough.The infrequent exercisers showed increased blood pressure, pulses and heartbeats. The moderate exercisers showed less reaction to the stress while the high-activity exercisers reacted even less.