Those are the reasons. While Velofel those under 18 still have to exercise caution, there are a few herbs that could help. Asian ginseng is one. Besides offering some help for athletic function, it may also improve brain function. Gingko is also useful, but for this herb, it is more for those needing mental endurance. For some reason, when endurance is mentioned, libido comes to mind. There are herbs that can help both men and women. I won't go into the how and why, but I Velofel will mention a few that could be useful.