Exercise improves your mood, reduces the risk of heart disease, and may keep your sperm healthy, according to a new study.

For this research, scientists looked at sperm samples from hundreds of men who qualified as sperm donors based on health and semen quality, according to the paper published in Human Reproduction.

All men displayed healthy levels of sperm concentration, or the amount of sperm present in semen; sperm morphology, meaning size and shape; and motility, or how well the sperm moves to implant an egg. Guys who logged the highest amount of time being active each week and performed the most intense exercises had better sperm motility, meaning their sperm moved better, the study found.

“Regular exercise may improve semen quality parameters among healthy, non-infertile men,” study co-author Dr. Yi-Xin Wang of Tongji Medical College of Huazhong University of Science and Technology in Wuhan, China, and the Harvard T.H. Chan School of Public Health in Boston, told Reuters.

Although exercise is undoubtedly beneficial, researchers still don't know the best length of time or types of exercises that are optimal for sperm health.

Of course, physical activity can help you maintain a healthy weight, which is shown to keep sperm healthy, according to urologist Dr. Ali Dabaja.

"If you have a lot of body fat, you’re going to have a lot of oxidative stress to the body," Dabaja previously told Men's Health.

Higher amounts of oxidative stress has been shown to lower sperm quality, according to Dabaja.

Maintaining an active lifestyle and healthy diet are the best ways to improve sperm health.