Yes they will. They will help, sarms along with other peds will definitely enhance your results and many are proven to provide increased cardiovascular capacity and insurance results . Regardless of rules however, I really wouldn’t suggest using them if your a youth rower. Most sarms come with testosterone suppression and this suppression with young people may last for a very long time. Drugs like cardarine and ostarine will definitely have insane benefits when it comes to short term endurance results, but your cheating your body out of finding out who you really are. The drugs also have lots of risks associated with minors. Sure you’ll clock in a pr, but that may be the only pr you have ever pull for the rest of your rowing career. The aspect of them being banned from the sport should be enough of a deterrent from their use, but this is a case where your really just hurting yourself alot more then others if you choose to partake.