(CNN) If you live in Washington D.C., Houston or Atlanta, it might be time to take a vacation.

Those three cities, followed by Seattle and Chicago, are the most overworked cities in the United States, according to a study released by the mobile technology company Kisi this past week.

For those looking to catch a break at work, consider San Diego, Sacramento and Omaha: the study rated those cities as the least work-intensive.

Researchers came to these conclusions by looking at how much time people dedicate to their jobs. They looked at factors like how many hours people work in a week, how long their commutes are, how many vacation days they take and how much paid family leave they're offered.

People in Washington D.C. work about 43 hours a week on average, take nine days of vacation and spend about 35 minutes each day getting to work. The main factor dragging down the nation's capital seems to be the amount of paid family leave that's mandated by law. Currently, Washington has zero days of legally mandated paid leave, although the city has announced a paid family leave plan beginning in 2020

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