In Addition to bad highways and drivers, road holidays have a hidden risk: Heart attack.

Researchers in the US found that road-trippers were  more likely to  suffer a heart attack that vacationers who took planes, trains or other modes of travel. Driving requires concentration, which raises blood pressure-and the risk of cardiac incident , says lead author Willem Kop. Here,  tips for a heart-healthy journey:

• Don’t rush. hurrying has been linked to increased heart attack risk, say psychologist Peter Wish. So leave early, plan stops and play games in the car to relieve stress.

• Take breaks. Too much setting raises the risk of deadly blood clots. Stop to stretch every hour or so.

• Drink up. Dehydration taxes the heart.