Nearly 1 in 5 men in the U.S. has difficulty achieving or maintaining an erection . For those with mild or occasional ED , however , it would translate into noticeable improvements in sexual function , the researchers say . Erectile resistance is also a known harbinger of heart disease . Doctors should inform the public of this connection , they say . It is key for heart function and blood vessel development .
Nearly 1 in 5 men in the U.S. has difficulty achieving or maintaining an erection . Erectile resistance is also a known harbinger of heart disease . Doctors should inform the public of this connection , they say . It is key for heart function and blood vessel development .