Brisk walking lowers risk of high cholesterol, high blood pressure and diabetes as well as running, suggest researchers. The study looked at walking and running expenditure by distance, not by time. Published inArteriosclerosis, Thrombosis and Vascular Biology, the findings take away an excuse not to exercise. "People are always looking for an excuse not to exercise, but now they have a straightforward choice to run or to walk and invest in their future health," says Paul T. Williams, Ph.D., the study's principal author and staff scientist at Lawrence Berkeley National Laboratory. The study involved 33,060 runners taking part in the National Runners' Health Study, as well as 15,045 walkers with the National Walkers' Health Study.