Truck drivers and social service workers have something in common: The people who work in these two occupations are the least likely to be heart healthy, according to a new report from the Centers for Disease Control and Prevention.

In the study, researchers looked at seven measures of heart health in more than 66,000 employees across 22 occupations in 21 states.

To determine how heart healthy people were, the researchers counted up how many of the American Heart Association's seven "ideal" metrics of heart health each person met: whether they refrained from smoking, were physically active, had normal blood pressure and normal blood glucose, were an ideal weight, registered normal cholesterol levels and ate a healthy diet.

RELATED: Even a 5-Minute Run is Good for Heart Health

Overall, they found that 3.5 percent of all workers met all seven of the heart-healthy metrics according to the report, published today (Aug. 11). Meeting six or seven of these metrics is associated with a lower risk of dying of heart disease, compared with people who meet none or one, according to the researchers.

They also found that 9.6 percent of all workers met just two or fewer of the health metrics. But among community employees and social services employees, 14.6 percent met two or fewer of the heart-healthy metrics, and among those who worked in transportation or "material moving," 14.3 percent met two or fewer of the metrics, the researchers found. In other words, these occupations were the least likely to be heart healthy.

On the other hand, people who worked in farming, forestry or fishing, as well as those in a broad category that included jobs in arts, design, entertainment, sports and the media, had lower rates of hitting two or fewer of the health metrics, with 5 percent and 5.9 percent, respectively, the researchers found.

The data in the report about the people's behavior's came from the CDC's 2013 Behavioral Risk Factor Surveillance System survey. Other data, such as blood pressure and cholesterol measurements, were separately self-reported by the participants.

WATCH VIDEO: How Worms Can Fix Your Heart