Great, fitness-focused domain name that blends in the words "gym" and "fantastic".
Gymtastic has nine characters and three syllables. Three syllable names are used by established brands like McDonald's, Toshiba and Adidas.
Gymtastic.com is a .com domain. Dot com domains are the most valued top-level-domain in the world, used by famous websites like twitter.com. A .com is the first thing people think of when they think of a website.