Many adults admit to having little or no time to exercise, and statistics support the notion that men and women simply aren’t exercising enough. According to the National Center for Health Statistics, only 21 percent of adults ages 18 and older met the physical activity guidelines for aerobic and muscle-strengthening activity. The World Health Organization recommends that healthy adults between the ages of 18 and 64 should do at least 150 minutes of moderate-intensity aerobic physical activity throughout the week or do at least 75 minutes of vigorous-intensity aerobic physical activity throughout the week, while also performing muscle-strengthening activities involving the major muscle groups at least two days per week.