Question

One-fourth of adults in the United States are not active at all.

Answer 1

Yes, it is true that "only one-half of U.S. young people regularly participate in the vigorous physical activity". One-fourth report no vigorous physical activity. One-fourth of young people walk or bicycle nearly every day. About 16 percent of young people report no recent vigorous or light to moderate physical activity.

Answer 2

This is true.

According to the CDC 25% of American adults report no physical activity at all. This would be a fourth of the adults. The percentage is lower in adolescents making up around 14% that do not physical activity.