Brisk walking may increase longevity in women. A large study conducted by researchers from Brigham and Women’s Hospital in Boston, MA measured physical activity in older women with sensitive activity trackers and then followed them for up to four years. The study found that there was a strong relationship between the amount of exercise recorded on the women’s activity trackers and a lower risk of death from all causes during the follow-up period. The most active 25 percent of the women had a 60–70 percent lower risk of dying over the follow-up period than the least active 25 percent. While many studies have shown that physical activity lowers mortality rate, previous studies have relied heavily on self-reported physical activity, with self-reports tending to be less precise. Want to shed a few pounds?