Both produce benefits but walking cuts risk of heart trouble by a greater amount when the same energy is expended-
Brisk walking reduces the risk of heart disease more effectively than running when the energy expenditure of both activities is balanced out, a study has found.
Researchers compared data from two studies of 33,060 runners and 15,045 walkers. For the same amount of energy used, walkers experienced greater health benefits than runners.
The effects on participants, who were aged 18 to 80, were observed over a period of six years.
Running reduced the risk of heart disease by 4.5% while walking reduced it by 9.3%.
Calorie for calorie, walking also had a stronger impact on heart disease risk factors. The risk of first-time high blood pressure was reduced by 4.2% by running and 7.2% by walking.
First-time high cholesterol risk was lowered by 4.3% by running and 7% by walking.
The risk of first-time diabetes was reduced by about 12% by both walking and running.
"Walking and running provide an ideal test of the health benefits of moderate-intensity walking and vigorous-intensity running because they involve the same muscle groups and the same activities performed at different intensities," said study leader Dr Paul Williams, from the Lawrence Berkeley National Laboratory in California.