It might not be obvious to those who spend Saturdays cheering on their alma mater on the gridiron, but playing college football is linked to changes that negatively affect the heart.

However, not all players are affected equally position makes a difference, a new study finds.

In the research, linemen were more likely to develop high blood pressure over the course of a season than players in other positions were, according to the study, published Dec. 5 in the journal JACC: Cardiovascular Imaging.

Linemen tend to be bigger than other players on the field, as their primary job is to block and tackle . Indeed, the linemen in the study had, on average, higher BMIs than players in other positions, such as quarterbacks and wide receivers.