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D. Differences in Physical Activity Among Ethnic Groups

Narrator: This is Science Today. A recent study suggests most Americans spend little or no time on physical activity - whether at the gym or during leisure time. Gladys Block, who led the University of California, Berkeley study says instead, Americans are nine times more likely to watch television or movies - and there are differences among ethnic groups, too.

Block: Eighty-five percent of whites had no participation in leisure time physical activities and it was higher in African Americans than it was in whites. Ninety-one percent of African Americans spent no time at all on leisure time physical activities.

Narrator: Block says Americans' busy schedules are one reason physical activity is low on the national priority list - but part of the reason for the ethnic group differences are a lack of parks and areas to exercise in urban areas.

Block: Many African Americans live in low-income neighborhoods where there may not be parks that are convenient to walk to or take the children to and where they might not feel safe walking.

Narrator: For Science Today, I'm Larissa Branin.