An agonist is contracting muscle, also called the prime mover, that is resisted or counteracted by another muscle, the antagonist.  See Also Antagonist References ↑ Donche, Dan (2008). FF Trainer Certification Guide. USA: Fatal Fitness. Retrieved from "https://athletics.fandom.com/wiki/Agonist?oldid=2864" Categories: Muscular System Kinesiology Community content is available under CC-BY-SA unless otherwise noted.