US Physical Activity Guidelines: Current state, impact and future directions.

Regular physical activity is one of the most powerful methods to lower the risk of all-cause mortality, help control multiple medical co-morbidities and improve overall quality of life. For optimal health it is recommended that adults obtain at least 150 min per week of moderate-intensity or 75 min per week of vigorous-intensity aerobic exercise per week along with at least 2 days of muscle-strengthening activity. Despite the known health benefits of exercise and long-standing recommendations from major health, medical and fitness societies, only half of Americans meet these guidelines. The Physical Activity Guidelines for Americans, 2nd edition from the U.S. Department of Health and Human Services provides an update from the 2008 guidelines adding specific recommendations for pre-school children while emphasizing the need to reduce sedentarism across the age spectrum ("move more and sit less"). This document provides a summary of the 2018 Physical Activity Guidelines for Americans as well as the impact of inactivity on health and future directions to improve utilization.