More guidance for optimal levels of physical activity for lower risk of mortality. Researchers in the August 16, 2022, issue of Circulation analyzed the leisure-time physical activity of over 116,000 adults to determine the effect of long-term moderate versus vigorous physical activity on mortality. Participants completed surveys every two years over a 30-year period. Vigorous activity included running, swimming, bicycling, aerobic exercise, racket sports, and climbing stairs, while moderate activity included walking, low-intensity exercise, weight lifting, and calisthenics. The researchers found that participants reached the maximum benefit for lower mortality risk with about 150 to 300 minutes a week of vigorous physical activity or 300 to 600 minutes a week of moderate physical activity, or a combination of both. Additional time spent or higher levels of activity did not improve outcomes, nor did it result in greater risk of mortality.