Explain the difference between moderate and vigorous physical activity.

Moderate physical activity refers to a caloric expenditure of approximately 750 kilocalories per week, and typically individuals can achieve this goal by exercising for 30 minutes, 5 days per week. Vigorous physical activity has been defined as exercise that elevates an individual's heart rate to 70 percent of maximum heart rate. Vigorous activities generally include bicycling (10 miles per hour or faster), cross-country skiing, jump roping, race-walking, running, stair walking, swimming, and vigorous dancing.