Guys, here’s another reason to hit the gym.

Scientists found that regular exercise is good for a man’s sexual prowess, the Australian Associated Press reported.

The research, which focused on swimming rats, analyzed two groups of rodents who were relatively old. One team was trained to swim in a tank for 30 minutes a day, five days a week. The other group did nothing as the exercise regimen continued for the next eight weeks, according to the report.

The study was also replicated in a group of younger rats, and in both cases, the exercised rats showed increased testosterone levels and improved activity in the way they processed chemicals responsible for causing an erection, the AAP reported.

"Regular exercise may ... improve an erection by increasing penile neurotransmitter and plasma testosterone levels in both young and aged rats," the study concluded.

Dr. Chris McMahon, an Australian sexual health expert, commented on the results.

"If you exercise these aged rats, who are probably parallel to aged men in their 60s and 70s, you can improve the way that their blood vessels work," McMahon told the news agency.

"Theoretically, you can improve vascular health, cardiac health, increase longevity and quality of life.”

Click here to read more from the AAP.