Americans are taking extra steps (get it?) to ensure they stay physically fit these days. The Pew Research Center reports that 21% of U.S. adults wear a smart watch or some other kind of fitness tracker to monitor their physical activity - 18% of men and 25% of women.

Many fitness apps allow the data they collect to be shared with health researchers, which raises privacy concerns for some. Still, 41% of Americans feel it’s acceptable to use information to research the link between exercise and heart disease, as opposed to 35% who disagree, and 22% aren’t sure.

Among people who actually use a fitness tracker, 53% agree that sharing is acceptable, but only 38% of those who don’t use trackers say the same.