Who says we need to hit the gym for hours and hours? Because a new study shows that short bursts of activity can be just as good for us as spending hours at the gym. How short are we talking? According to researchers at Oregon State University, just two minutes of moderate activity – like pacing while talking on the phone, doing housework, or doing sit-ups during TV commercials – is enough to lower our blood pressure and cholesterol levels. And if we squeeze in enough short bursts of activity to get at least 30 minutes of exercise a day, researchers say that’ll improve our health as much as a traditional workout.