Hitting the gym regularly might be shrinking your gut, but go too hard and something else might be diminishing, too: your sex drive. At least, that’s what researchers out of the University of North Carolina is suggesting, after their study found that frequent and high intensity exercise is linked to a lower libido. In the study of 1,077 active men who ran, walked, biked, swam, or lifted, those who said they trained at the lowest intensities were nearly 7 times as likely to report a normal or high libido than those who trained at the highest levels of intensity. Plus, those with the highest duration of chronic training—the total number of hours per week they trained, multiplied by how many years they sustained it for—were about 4 times as likely to report a normal or high libido than those with lower training volumes.