Try to do moderate activity, such as brisk walking, at least 2 hours a week.

"I tell my patients, engage in at least 30 minutes of moderate to brisk walking."

Exercising, such as brisk walking, that raises your heart rate.

For example, you might replace some of your brisk walking with jogging or running.

Let's say that you want to meet the recommendation of doing moderate activity, like brisk walking, for at least 2 hours a week.

One of the best and easiest aerobic activities is brisk walking.

Do some sort of moderate aerobic activity, like brisk walking, for at least 2 hours each week.

There followed another period of quick trotting and more brisk walking.

Getting regular aerobic exercise (such as brisk walking at least 30 minutes a day, several days a week).

I'm a firm believer in moderate levels of activity - brisk walking, for example.