Which level of physical activity should be done each day?

1. low and vigorous

2. vigorous

3. a mix of low, moderate, and vigorous

4. moderate to vigorous

How can a friend directly influence you to buy a health product? he tells you to buy it because of how good the product is. ob. you hear him exclaim how great this product is. c. you see this post on a social networking site saying how much he likes it reset next