French researchers have found that a mental stress-related increase in heart rate before exercise appears to be associated with an increased risk of heart attack later in life for men. For the study, investigators followed the progress of 7,700 men for an average of 23 years. They found that men whose heart rate increased by more than 12 beats per minute during mild mental stress before an exercise test at the start of the study were twice as likely to die of sudden heart attack later in life...
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