Gabriel KP, et al. - Researchers used a midlife cohort to analyze the changes in accelerometer-determined physical activity (PA) and sedentary time over a period of 10-years. Study participants were Coronary Artery Risk Development in Young Adults participants who wore the accelerometer with valid wear (≥4 of 7 days, ≥10 hours per day) at baseline and 10-year follow-up. They noted that by race/sex groups, 10-year change estimates notably varied for accelerometer counts, sedentary time, and moderate to vigorous intensity PA bouts. Relative to other groups, the greatest attenuations in PA was seen in black men. Reductions in light intensity PA with increases in sedentary time characterized PA declines during midlife; these may have important health consequences. Irrespective of intensity level, there is a need for targeted efforts in order to preserve PA across midlife.